do her level best

• conj. 全力以赴(尽最大努力)

例句

用作连词 (conj.)

1. I shall do my level best to help you in every way.
   我将全力以赴在各个方面帮助你。
2. She has done her best,her utmost.
   她已尽了最大努力，已全力以赴了。