Under certain conditions you can accept the adaptation suggested by Adapt It. You do this by pressing Enter.
The conditions that you would do this include:
Adapt It encounters a new word in the source text. Adapt It copies the word into the Phrase box. If that source word is the same in the target language, press Enter to accept the word into the knowledge base and move to the next empty location.
If you are working in Reviewing mode or in Single Step mode, Adapt It makes a suggestion from the knowledge base.