keep at
phrasal verbkeep at something
- to continue working at something
继续做某事（或坚持干） - Come on, keep at it, you've nearly finished!
快，要坚持，你马上就要完成了！
- Come on, keep at it, you've nearly finished!
keep somebody at something
- to make somebody continue working at something
使某人继续做（或坚持干）某事 - He kept us at it all day.
他让我们不停地干了一天。
- He kept us at it all day.