Before revision:  However, it is often overlooked that the decoder only has a single view of the source sequences, that is , the representations generated by the last encoder layer , which is supposed to be a  global view of source sequences .
After revision:  However, it is often overlooked that the decoder only has a single view of the source sequences, i.e. , the representations generated by the last encoder layer , which is supposed to be a global view of source sequences .