Guiding Neural Machine Translation with Retrieved Translation Pieces
Table 9: Translation results (BLEU) of 1/0 reward.
['dev', 'NMT', 'en-de 44.08', 'en-fr 57.26', 'en-es 55.76']
However, T2 contains more and longer translation pieces with higher scores. The three translation pieces contained only in T1 are also translation pieces collected for the input sentence, but have lower scores, because they are collected from sentence pairs with lower similarities with the input sentence. This shows that computing scores for translation pieces based on sentence similarities is important for the performance of our method.