brush up

擦亮, 温习

例句与用法：

I hadn't thought that we would brush up against so much opposition in this town.

我没有想到我们会在这个城里遭到这么多的反对。

Brush up your shoes.

把你的鞋子刷干净。

I must brush up (on) my Italian before I go to Rome.

我去罗马以前必须把意大利语重温一下。

I must brush up my English before I go to London.

去伦敦之前，我必须好好温习一下英文。

详细释义：

刷拭(衣物), 温习(语言)

He needs to brush up his English before he goes to the U.S.

他去美国之前必须先温习他的英文。