brush up

US /brʌʃ ʌp/
UK /brʌʃ ʌp/
"brush up" picture
1.

温习, 复习

to improve one's knowledge or skill in something quickly

:
I need to brush up on my Spanish before my trip to Mexico.
去墨西哥旅行前,我需要温习一下我的西班牙语。
She decided to brush up on her coding skills.
她决定温习一下她的编程技能。