及物动词
1. 强调；凸显
If one thing, for example an action or an event, underlines another, it draws attention to it and emphasizes its importance.
2. 在…下画线
If you underline something such as a word or a sentence, you draw a line underneath it in order to make people notice it or to give it extra importance.
1. a line drawn underneath (especially under written matter)
Synonym: underscore