brush up

v.擦亮,复习,提高

refresh one's memory
[同] brush up, refresh, review
[例]
I reviewed the material before the test
bring to a highly developed, finished, or refined state
[同] brush up, polish, polish up, round, round off
[例]
polish your social manners

Mr. Jones wanted to Brush up on his computer skills.
琼斯先生想要温习他的计算机技术。
I need to Brush up my French.
我必须温习法文。
She thought of brushing up her shorthand.
她想到要复习一下过去学过的速记术。
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。

1. 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。