a)HAPPYto become less sad, or to make someone feel less sad (使)高兴起来,(使)振作起来
Cheer up! The worst is over.
振作起来!最坏的情况已经过去了。
They cheered up when they saw us coming along.
他们看到我们来了,就高兴了起来。
cheer somebody ↔ up
Here’s a bit of news that will cheer you up.
有个消息会让你振奋起来的。
You both need cheering up, I think.
我想你们两个都需要振作起来。
b)cheer something ↔ up to make a place look more attractive 装饰,装点
I bought some posters to cheer the place up a bit.
我买了些装饰画把这地方布置得更漂亮点。
Examples from the Corpus
cheer up• I tried to cheer him up by telling a joke.• Cheer up! It's not that bad.• Cheer up! It's not the end of the world.• Cheer up, Mandy - the insurance will cover most of the damage.• Cheer up, Phil! It's only a game, and you can't win every time.• Cheer up, Phil. You'll find another job.• As a clown he visitslocalhospitals to cheer upsick children.• You'd better get dressed and cheer up. The guests are coming any minute.