Epoch,BLEU-4 1,0.0836 2,0.0923 3,0.0986 4,0.0996 5,0.1011 6,0.1009 7,0.1028 8,0.1029 10,0.1032 11,0.1024 12,0.1011 13,0.1028 14,0.1034 15,0.1042 16,0.1047 17,0.1035 18,0.1054 19,0.1053 20,0.1058 21,0.105 22,0.1049 23,0.1051 24,0.1056 25,0.1028 26,0.1031 27,0.1046 28,0.1039 29,0.1032 30,0.1039