1.come back 回来
Don't you dare come back again!
你敢再回来!
2.at once 立刻, 马上
The man was so genial, so I was drawn to him at once.
这人这么和蔼,我立刻为他着迷。
3.give up 放弃
I give up; tell me what the answer is.
我认输,告诉我答案吧。
4.according to... 根据..., 依照...,
The books in the library were distributed according to subjects.
图书馆里的藏书按科目分类。