Before revision:  In this study, aiming to solve these vocabulary mismatches in distant domain adaptation , we propose vocabulary adaptation, a simple method for effective fine-tuning that adapts embedding layers in a given pre-trained NMT model to the target domain.
After revision:  In this study, aiming to solve these vocabulary mismatches in domain adaptation for neural machine translation (NMT) , we propose vocabulary adaptation, a simple method for effective fine-tuning that adapts embedding layers in a given pre-trained NMT model to the target domain.