Update README.md

README.md

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 ## Introduction
 
-We curate **Unified Time Series Dataset (UTSD)** that includes **7 domains** with up to **1 billion time points** with hierarchical capacities to facilitate research of large models in the field of time series.
+We curate **Unified Time Series Dataset (UTSD)** that includes **7 domains** with up to **1 billion time points** with hierarchical **four volumes** to facilitate research of large models and pre-training in the field of time series.
 
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 <img src="./figures/utsd.png" alt="" align=center />
@@ -41,7 +41,7 @@ See the [paper](https://arxiv.org/abs/2402.02368) and [codebase](https://github.
 
 ## Dataset detailed descriptions.
 
-We analyze each dataset within our collection, examining the time series through the lenses of stationarity and forecastability to allows us to characterize the level of complexity inherent to each dataset.
+We analyze each dataset, examining the time series through the lenses of stationarity and forecastability to allow us to characterize the level of complexity inherent to each dataset.
 
 | Domain       | Dataset                         | Time Points | File Size | Freq. | ADF.    | Forecast. | Source                                    |
 |--------------|----------------------------------|-------------|-----------|-------|---------|-----------|-------------------------------------------|