blow your nose 

blow /bl??/ v. （風(fēng)）刮，吹；（用嘴）吹氣

blow out the candles 吹蠟燭

to force air from your lungs and through your nose to clear it

擤鼻子

You can also blow your nose when you are sick.

當(dāng)你生病的時(shí)候你也可以擤鼻子。

What do you blow your nose with when you've got a cold?

你感冒時(shí)用什么擤鼻涕?

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