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[ { "content": "Whether you are fitness fan or plan to go eco-friendly, you have a countless number of bikes to choose from. Here are some tips on how to choose bikes for women. Firstly, if you have decided to buy a bike, let me congratulate you! This is because you are kind to the environment. Before you go to a...
[ { "content": "A new term might be the best time to make new friends, but it can be hard to begin the first conversation. Below are four useful ways. Take a look. Search for common interests. Talking about shared interests, such as sports and popular talent shows, is the easiest way to make a successful talk wit...
[ { "content": "Computers are very important to modern life. Many people think that in the future computers will be used a lot in everyday's life. It is thought that we won't have to go shopping because we will be able to get most things which are sold in shops on the Internet. There will be fewer books because w...
[ { "content": "President Barack Obama speaks as he meets with Chinese President Xi Jinping over international security issues during the Nuclear Security Summit in Washington, March 31, 2016. While they report slow progress over major disagreements, what do average citizens in those countries think about each o...
[ { "content": "The role of a newspaper is to present and comment on the news. It is vital for keeping people well-informed on current affairs. In most Western countries, journalists try to shape the ideas and opinions of their readers, since in Western countries all newspapers are independent of the government. ...
[ { "content": "We can express our feelings and needs by using body language. Cats can do that too. The ways that cats use their tails to show their feelings and needs are interesting. Unlike dogs, which generally wave their tails to express good feelings, cats use their tails to send a lot of signals. When a cat...
[ { "content": "Antarctica is in the most southern part of the world. It is like nowhere else on the earth. It is much larger than Europe, and nearly twice the size of Australia. Antarctica is the coldest and windiest place in the world, even colder and windier than the North Pole. In summer, the sun shines for t...
[ { "content": "A group of frogs were travelling through the woods. Two of them, Nick and Jack, fell into a deep pit . All the other frogs gathered around the pit. When they saw how deep the pit was, they told Nick and Jack that they were as good as dead. Nick and Jack ignored what the other frogs said and tried...
[ { "content": "A car converts gasoline into motion and heat through what?\n\nChoices:\nA. explosive charisma\nB. cooling\nC. incineration\nD. warming", "role": "user" }, { "content": "C. incineration", "role": "assistant" } ]
[ { "content": "A typical lion tamer in people's mind is an entertainer holding a whip( ) at a chair. The whip gets all of the attention, but it's mostly for show. In reality, it's the chair that does the important work. When a lion tamer holds a chair in front of the lion's face, the lion tries to focus on all f...
[ { "content": "Eureka, Inc., inventor of the LBVC, a laser-beam vegetable chopper, ran a television ad that described the chopper and said, \"The LBVC is yours for only $49.99 if you send your check or money order to Box 007, Greenville. Not available in stores.\" Gourmet, who owned a retail specialty shop, wrot...
[ { "content": "The Ivy League is an athletic conference comprising eight private institutions of higher education in the Northeastern United States. The term is most commonly used to refer to those eight schools considered as a group. The term is also connected with academic excellence, selectivity in admissions...
[ { "content": "Water is of vital importance in a healthy diet and lifestyle. There are many health benefits of drinking water .It helps get _ out of our systems. It aids in the delivery of oxygen and nutrients .In fact, nearly every system in our bodies depends on water for proper functioning .But how can we tel...
[ { "content": "The mobile phone rule is just common polite behavior. Most people today have a mobile phone. In fact, many people can't imagine how they ever get along without them. However, many people also complain about mobile phone users. People complain about other people loudly discussing personal matters ...
[ { "content": "When I was five years old. I took a boat out on the river and went fishing by myself. I really wanted to catch a fish! But they were not biting. I stayed in my boat for three days, waiting. A few times, I thought I felt a fish at the end of the line. The first time I pulled in my catch, it was not...
[ { "content": "Hello, my name is Gina. John, Anna and I are good friends. We are in the same grade. But they are in Class Five and I am in Class Three. We get up at 7:00 and go to school at 7:30. In the morning we have four lessons. We have English every morning. John and Anna have English at 10:00 in the mornin...
[ { "content": "Student Services Students' Union Every University has a Students' Union. If students are the lifeblood of a university, the Union is surely its beating heart. For students, by students A Students' Union is run by students and acts independently. At the end of each academic year, it will find six s...
[ { "content": "On November18, 1995, Itzhak Perlman, the world famous violinist, came on stage to give a concert at Lincoln Centre in New York City. If you have ever been to a Perlman concert, you know that getting on stage is not easy for him. He got polio as a child, and has to walk with the aid of two crutches...
[ { "content": "BALTIMORE. MARYLAND--An old postcard changed the lives of an eleven-year-old boy and a very sick woman. The postcard had a picture of the steamship Titanic. The Titanic was the largest ocean ship in the world. It hit an iceberg and sank on April 14. 1912. More than 1,500 of the 2,200 people on the...
[ { "content": "It was Monday. Mrs Smith's dog was hungry, but there was not any meat in the house.Considering that there was no better way, Mrs. Smith took a piece of paper, and wrote the following words on it \"Give my dog half a pound of meat. \" Then she gave the paper to her dog and said gently:\" Take ...
[ { "content": "Teenage life is interesting, adventurous and difficult. Teenagers have to go through many problems. It may probably be a family problem or a school problem. It is important to learn how to deal with those problems. Be grateful of your parents' support. When you have a problem, ask your parents t...
[ { "content": "Almost one - fourth of all personal spending in theprefix = st1 /United Statestakes place during the holiday season. There are gifts to give this month for Christmas, Hanukkah and the African American celebration of Kwanzaa. The traditional shopping season began last Friday, after Thanksgiving Day...
[ { "content": "The Swiss army knife is a popular device that is recognized all over the world. In Switzerland, there is a saying that every good Swiss citizen has one in his or her pocket. But the knife had poor beginnings. In the late nineteenth century, the Swiss army issued its soldiers a gun that required a...
[ { "content": "SHANGHAI - Health experts in Shanghai are calling for more protection for young children as the latest research shows about half of the youngsters are suffering from secondhand smoke. About 45 percent of children suffer passive smoking in families, 50 percent in public places, and almost 6 percent...
[ { "content": "There are more than 100 million cars in the United States. An ordinary car gets less than 15 miles from each gallon of gas. It travels about 10,000 miles each year. In that time, it uses about 650 gallons of gas. In all , automobiles use up some 70 billion gallons of gas a year. That comes out t...
[ { "content": "My name is Mary Green. I live in a new house with my parents. There is a beautiful and a small room for me. I like it very much. Now let me tell you something about my new house. My new house is on a busy street. There is a big, new and clean park across from my house. I can see the flowers in it ...
[ { "content": "There was a king who gave his daughter a beautiful diamond necklace. The necklace was stolen and his people in the kingdom searched everywhere but could not find it. So the king asked to search for it and put a reward for$50,000 for anyone who found it. One day, a clerk was walking home along a ri...
[ { "content": "like many other fruit,Cherries are packed with antioxidants that may help to prevent cancer and heart disease,as well as slow the aging process.Perhaps you've heare about the controversy between the FD(Food and Drug Administration)and the cherry industry and wondered what it was all about.Are che...
[ { "content": "Uncle Wang is fifty. He has two sons, Wang Lei and Wang Fei. They are twins. They are twenty -two. Wang Lei likes making things. He makes many different things. Today he's making a machine. He wants to ride the machine like a bike and fly it like a plane. Wang Fei doesn't like making things at all...
[ { "content": "Have you ever been ill? When you are ill,you must be unhappy because your body becomes hot,and there are pains all over your body. You don't want to work,you stay in bed,feeling very sad. What makes us ill? It is germs . Germs are everywhere. They are very small and you can't find them with your e...
[ { "content": "David and Sue went to their Auntie's house to visit on Saturday morning. She had some new ducklings in the pond that they wanted to see. They went out to the pond and on the way they saw a frog. They also saw a boat in the water. They saw a water lily. They looked in the water until they saw th...
[ { "content": "Sports, drama, and all kinds of organizations keep students busy during high school. Where do they get the money to do these things? Not everyone gets it from parents. Most have to work for at least some of the money to pay for these activities. Some adults question if high school students should ...
[ { "content": "Lipitor is a prescription medicine. Along with diet and exercise, it lowers \"bad\" cholesterol in your blood. It can also raise \"good\" cholesterol. Lipitor can lower the risk of heart attack in patients with several common risk factors, including family history of early heart disease, high blo...
[ { "content": "Children and teenagers who spend lots of time in front of screens-especially TVs-are easier to get more weight as they age .according to a new study. The findings agree with research suggesting all that inactive sitting and always watching advertisements may lead to poor eating habits. ...
[ { "content": "Sometimes Karen likes to go to the library. Her friend Michael also likes the library, but her other friend James does not like the library. Karen and Michael like to read about different things. They can learn about things that they don't know much about. They also like to read fun and exciting s...
[ { "content": "Hi! I am Jack. I am thirteen years old. I'm an English boy. Now I'm in China with my parents. I go to a middle school in Tianjin. This is my school day. I get up at half past six. I go to school at seven o'clock and I go to school in my dad's car. I want to walk to school, but the school is far fr...
[ { "content": "Mark Twain's works are enjoyed worldwide. His real name was Samuel Langhorne Clemens and he was born on November 30th, 1835, in the village of Florida, Monroe County, Missouri. After his father's death in 1847, Twain was apprenticed to a printer and wrote for his brother's newspaper. Later, Twain...
[ { "content": "Hair has always been an important sign of beauty. This is especially true for women. Next to the face, hair is one of the main qualities people look for when they consider a woman's beauty. Whether long or short, curly or straight, hair often gets a lot of attention. Each hair on a person's head g...
[ { "content": "Today, due to numerous medical and scientific advances, people are living longer than ever before. But you have to be good to your body, mind, and soul. The following tips are a good start for getting you on your way to living a long and healthy life. Eat a balanced diet -- one that is rich in...
[ { "content": "As more women in the United States move up the professional ladder, more are finding it necessary to made business trips alone. If you are married, it is a good idea to encourage your husband and children to learn to cook a few simple meals while you are away. They will be much happier and probabl...
[ { "content": "When the man's wife died, their youngest baby was 2 years old. They had six other children -- three boys and three girls, aged from 4 to 16. The man's parents and his wife's parents came to visit. \"We've been talking about how to make this work,\" they said. \"There's no way you can take care of ...
[ { "content": "Now, I'm studying in the US. I find there are some differences between schools in the US and in Vietnam. One big difference is the clothes students wear at school and how they look. In my country, all the students should wear uniforms when they go to school. Boys aren't allowed to have long hair. ...
[ { "content": "November 9 is a time for us to learn a lot more about fire . This is what to do in a fire: 1.Shout out. Shout as loudly as you can, because people may be asleep. 2.Call 119. Never try to put out a fire yourself. Tell 119 where you are and what is on fire. 3.Keep down close to the floor. There is l...
[ { "content": "The secret of carrier pigeons' unbelievable ability to find their way home has been discovered by scientists: _ follow the roads just like we do. Scientists now believe the phrase \"as the crow flies\" no longer means the shortest most direct route between two points. They say it is likely that ...
[ { "content": "International students studying in the UK The UK has a long history of welcoming international students to study in its universities and colleges. In the UK last year there were over 104,000 international students. Choosing which university or college to go to was like a life-changing decision. Do...
[ { "content": "It looks like a scene from the thriller movieJaws,but these photos of a huge shark swimming with swimmers were in fact taken in Britain. The amazing pictures,which showed that the basking shark was swimming friendly with swimmers,were taken at Porthcurno beach,Cornwall,where the basking shark wa...
[ { "content": "Mrs. Green is going to give a birthday party for Mary. Mary is her daughter. She is going to be ten years old. A lot of friends of Mary's are going to come to the party. There are twenty girls of them. Mrs. Green is getting ready for the party. Mrs. White is helping her. \"That's a big nice cake,\...
[ { "content": "Not everyone can afford their own vehicle,and with the high demands of consumers and incredible expectations of today g leading engineers,public transportation needs all the improvement it can get. Nowadays,there aren't many comfortable alternatives to owning your own car,unless you're happy w...
[ { "content": "John Doe, the owner of a milk container manufacturing firm, sought to focus public attention on the milk packaging law of the State of Clinton in order to have it repealed. On a weekday at 12 noon, he delivered an excited, animated, and loud harangue on the steps of the State Capitol in front of t...
[ { "content": "People in South Korea who feel they can no longer bear the stress of everyday life now can choose to stay in a prison to relax and think deeply. In a society where pressure to do well in school and find highly-paid jobs is intense, a former lawyer came up with an extreme relaxation idea. Kwon Yong...
[ { "content": "All rocks are composed of\n\nChoices:\nA. fossils\nB. cells\nC. metals\nD. minerals", "role": "user" }, { "content": "D. minerals", "role": "assistant" } ]
[ { "content": "Angie went to the library with her mother. First she had to turn in the books she was returning at the return desk. They said hello to the man there. He took their books. Then they went into the adult reading room. Angie sat in a brown chair at the table. She made a drawing of her mother. H...
[ { "content": "One of the first things that Jim discovered while living with the Greens was that there were different television channels in Britain, the BBC broadcasts on two channels: BBC1 and BBC2. There is a mixture of serious and light programmes on BBC1; there are mainly serious programmes on BBC2. ITV is ...
[ { "content": "Some problems are difficult to solve.But there are a lot of number expressions that can help.For example, if we put two and two together , we might com e up with the right answer.We know that two heads are better than one.It is always better to workwith another person to solve a problem.Some probl...
[ { "content": "Far from the land of Antarctica , a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod. For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Ant...
[ { "content": "Dear Reader, Today I'm going to ask you to support Wikipedia with a donation. Sounds unusual: Why does one of the world's five most popular websites ask for financial support from its users? Wikipedia is built differently from almost every other top 50.We have a small number of paid staff, just tw...
[ { "content": "According to a survey, only 4% of the people in the world are left-handed. Why? One theory centers on the two halves of the brain. For example, the left half and the right half, each of which functions differently. Medical science believes that the left half of the brain dominates over the right h...
[ { "content": "My old digital camera broke down, so I wanted to buy a new one. Being the cautious type, I fancied a reliable brand. So I went on the Net, spent 15 minutes reading product reviews on good websites, wrote down the names of three top recommendations and headed for my nearest big friendly camera s...
[ { "content": "I have a pen pal in Canada. His name is Simon. He lives in Ottawa, Canada. He is twelve years old. He also studies in a middle school. Simon lives in a happy family. His father is a policeman and his mother is a bank clerk . Simon and his parents like exercising. They almost exercise every day. S...
[ { "content": "A boy was born to a couple after eleven years of marriage. They were a loving couple and loved the boy very much. When the boy was around two years old, one morning the husband saw a medicine bottle open. He was late for work so he asked the wife to cap the bottle and keep it in the cupboard. The ...
[ { "content": "Back to the Future With the help of a local inventor's time machine, Marty travels back to the 1950s. There his 80s hipness stands out, and he inadvertently interferes with the fledgling romance of his parents-to-be. Can Marty keep them together? He'd better, or his own future will fade away. Feat...
[ { "content": "When Frida Kahlo's paintings were on show in London,a poet described her paintings as \"a ribbon around a bomb\".Such comments seem to suggest Kahlo had a big influence on the art world of her time.Sadly,she is actually _ today than she was during her time. Born in 1907 in a village near Mexico C...
[ { "content": "A human who goes long periods of time without nourishment will experience\n\nChoices:\nA. Starvation\nB. Perspiration\nC. Fullness\nD. happiness", "role": "user" }, { "content": "A. Starvation", "role": "assistant" } ]
[ { "content": "There are seven continents in the world. Among them, Antarctica is the most special one. It is a world of snow and ice all year round. China has sent many scientists there. They try to find resources under the icy land and study climate change and sea biology. What do they eat? Scientists don't ha...
[ { "content": "If you go to visit London, you'll see a lot of buses and cars on the road. You'll also see many bikes because more people travel by bike. Why? There are many reasons. First, it is very cheap to buy a bike, and it is quick, too. You often need to wait for a bus for half an hour. When the bus comes,...
[ { "content": "According to a recent survey, British teenagers are damaging their health by not getting enough sleep because they are prevented from doing so by electronic gadgets in their bedrooms. According to the Sleep Council, \"junk sleep\" could compete with eating unhealthy junk food as a main worrying...
[ { "content": "Traffic lights are very important for us. I think you know this. But do you know how they were born? Garrett A. Morgan was the father of traffic lights. He was an American. His family was very poor. He left school at the age of 14. He was clever. He always looked for better ways to do things. And ...
[ { "content": "After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the previous day. The rest that you get while sleeping enables your body to prepare itself for the next day. There are four levels of sleep, eac...
[ { "content": "One day an out of work mimic is visiting the zoo and attempts to earn some money as a street performer. As soon as he starts to draw the crowd,a zoo keeper grabs him and drags him into his office. The zoo keeper explains to the mimic that the zoo's most popular attraction,a gorilla ,has died sudd...
[ { "content": "BERLIN -- With the crisis in Japan raising fears about nuclear power, Germany and Switzerland said on Monday that they would reassess the safety of their own reactors. Doris Leuthard, the Swiss energy minister, said Switzerland would put off plans to build nuclear plants. She said no new ones woul...
[ { "content": "Some people have travelled to Canada while others may have just heard of it . As is known to all, the Canadian red and white maple leaf flag is officially called The National Flag of Canada. The Canadian flag shows a stylized red maple leaf with 11 points on a white background, with red borders ...
[ { "content": "It was the first day of class. Two of her new ESL (English as a Second Language) classmates wanted to know where Tara was from. They were both from Korea. Because Tara looked Korean, one of the women asked Tara, in English, if she was from Korea. Tara replied, \"No, I'm not.\" Then the women took ...
[ { "content": "Babies are born yogis. Once we were all able to pull our toes up by our ears and laugh about it. Then we aged, got injured, and began carrying stress in our shoulders and back. In short, we lost our balance. Yoga is an ancient practice that helps create a sense of union in body, mind, and spirit....
[ { "content": "I shook hands with my father in the truck, and for a long time he looked straight ahead and didn't say a word.But I knew he was going to say a little to me.\"I can't tell anything.\" he finally said.\"I never went to college, and none of your brothers went to college.I can't say don't do this and...
[ { "content": "TUVALU, a tiny country in the Pacific Ocean, has asked for help as it will be swallowed up by the sea. Storms and huge waves are a constant threat and none of Tuvalu's nine little islands is more than five meters above sea level.Salt water is already entering the country's drinking water su...
[ { "content": "What would make it to your list of top 10 country songs? This article talks about the classic songs that make the cut... Ring of fire Sung by Johnny Cash, Ring of Fire remains as powerful a song today as it was when it was written and sung in the 1960's. Johnny Cash's singing, together with June C...
[ { "content": "Some people make you feel comfortable. You can easily spend an hour with them and feel as if you have known them your whole life. These people, who can make others feel relaxed, have great people skills and if we observe them we can learn a lot. How do they do it? Here are several ways to put othe...
[ { "content": "Two recent studies have found that punishment is not the best way to influence behavior. One showed that adults are much more cooperative if they work in a system based on rewards. Researchers at Harvard University in the United States and the Stockholm School of Economics in Sweden did the study....
[ { "content": "Working women make up nearly half of the U.S. workforce, and 51 percent of professional workers, like doctors, lawyers, nurses and accountants, are female. While climbing the career ladder can be rewarding, it often comes with one big downside: weight gain! New research published this week in the ...
[ { "content": "\"Your homework is to collect sounds and take them down,\" Mrs. Olson said before class was over. She handed out sheets of paper shaped like giant ears. On his way home, Colin glared out of the school-bus window. Not fair, he thought. How could he collect enough sounds on his family's farm? If onl...
[ { "content": "Around six weeks ago, Kaileen came running into the house, just getting off the bus from school. She was all excited about a story about homeless pets because of Hurricane Katrina and all that was going on to help them. She said that this information came from her animal newspaper (your KIND New...
[ { "content": "We all, at one time or another, have pretended to be a rock star, singing and dancing along to our favorite song. Most of us have done this in the privacy of our own room when we were kids and as adults, in the privacy of our homes. Me? I love to do that when I drive! I turn on the radio, find a s...
[ { "content": "Dealing with conflict in the workplace is rarely easy. Hurt feelings and anger can lead to lower employee morale as well as a loss of productivity and a poor work environment. As a manager. you should find some ways yourself to solve the conflict. The goal is to build a team-centered workforce. ...
[ { "content": "Companies can increase the money with which they run their business in a number of ways. One way is borrowing money, and another way is buying things with the agreement that payment would be made later. There are also other processes for providing money for use by a company. Two of these processes...
[ { "content": "Reading to oneself is modern activity which was almost unknown to the learned in the early days of the history, while during the fifteenth century the term \"reading\" undoubtedly meant reading aloud. Only during the nineteenth century did silent reading become popular. One should be careful, howe...
[ { "content": "We can't deny that trees are useful to man in three very important ways: they provide him with wood and other products, they give him shade, and they help to prevent drought and floods. Unfortunately, in many parts of the world man has not realized that the third of these services is the most imp...
[ { "content": "DoSomething.org is the country's largest non-profit organization for young people and social change. They provide some scholarships to reward teens who are social action leaders in their community. You may be interested in the following ones. 1. $2,000 Fight Climate Change like a Ninja Scholarshi...
[ { "content": "Qi Haoran, a Junior 1 student at High School Attached to Harbin Institute of Technology, was quite busy over the past winter vacation--and not just with homework. Qi, together with 10 other classmates made a volunteer group to call on people to join the Clean Your Plate Campaign . The 11 students...
[ { "content": "Life is like a train ride. We get on. We ride. We get off. We get back on and ride some more. There are accidents and there are delays .At certain stops, there are surprises. Some of these will change into great moments of joy; some will result in bad results. When we are born and we first get on ...
[ { "content": "Which force keeps the planets in their orbits around the Sun?\n\nChoices:\nA. gravity\nB. magnetism\nC. electricity\nD. friction", "role": "user" }, { "content": "A. gravity", "role": "assistant" } ]
[ { "content": "Where do you like to live? For this question, different people have different answers. Some people like to live in a city because there are many shops and supermarkets. They think it is convenient to buy things. But some people think it is good to live in a quiet town because they don't like the d...
[ { "content": "Running is becoming popular these days. Many of us run for health. Doctors say many health problems come from these bad habits: eating and drinking too much, smoking and not taking enough exercise. Doctors tell us. \"Eat and drink less, don't smoke, and exercise more.\" Running is a good way of ex...
[ { "content": "Ad 1 April Fool's party On Friday, April 1, Inner Affair goes back to the days of funk! Classic Tunes from the 70's and 80's by DJs Den & Sion, 9pm till late. Tickets: Free entrance for those in costume, otherwise 50 yuan (US$6) Time/Date: 9 pm, April 1 Place: Inner Affair, 1/F Qiankun Dasha, 6 Sa...
[ { "content": "Do Americans have morals ? That's a good question. Many people insist that ideas about right and wrong are merely personal opinions. Some voices, though, are calling Americans back to traditional moral values. William J. Bennett, former U.S. Secretary of Education, edited the Book of Virtues in 1...
[ { "content": "Lakes, ponds, and beaches mean summer fun and cool relaxation from hot weather. But water also can be dangerous for kids if you don't take great care. Nearly 1,000 kids die each year by drowning. Here are some tips to keep your kids safe in the water: At the Lake or Pond *Don't let little kids swi...
[ { "content": "On 17 March 2003, Robin Cook, Leader of the House of Commons and former Foreign Secretary, resigned from the Cabinet in protest against the coming war in Iraq. His resignation speech inspired the first long applause in the history of the House and marked the end of the ministerial career of one of...
[ { "content": "In the past, friendships were greatly limited by time, space and attention; increasing home and workplace mobility has made it even harder to keep social relations over time. Through a combination of user controls, new technologies and changing standards of social behavior, Facebook is freeing us ...
[ { "content": "Almost nothing we do in this world is done in isolation*. At work or at play, you'll find yourself in groups, working with other people: your team at work, a meeting with fellow workers, your family, a holiday with friends, a group of students working together, a group of neighbors wanting to make...
[ { "content": "Range At present,there are five network firms---China Telecom,China Unicom,Jitong Communications,China Netcom and China Mobile---that are allowed to operate IP services in China.Each company has its advantages in service. Charge As the Ministry of Information Industry co-ordinates,the charges of I...
[ { "content": "A \"talking kitchen\" teaches students how to cook French dishes and speak French. Researchers at New Castle University have developed the French Digital Kitchen. Professors Paul Seedhouse and Patrick Olivier led the project. Professor Seedhouse says that it works like a satellite navigation syste...