名詞 brush up:

1. practice intended to polish performance or refresh the memory
   同義詞：review, brushup

動詞 brush up:

1. refresh one's memory
   同義詞：review, refresh
2. bring to a highly developed, finished, or refined state
   同義詞：polish, round, round off, polish up

1. I hadn't thought that we would brush up against so much opposition in this town.
   我沒有想到我們會在這個城里遭到這么多的反對。
2. Brush up your shoes.
   把你的鞋子刷干凈。
3. I must brush up (on) my Italian before I go to Rome.
   我去羅馬以前必須把意大利語重溫一下。
4. I must brush up my English before I go to London.
   去倫敦之前，我必須好好溫習(xí)一下英文。