blow your nose
blow /bləʊ/ v. （风）刮，吹；（用嘴）吹气
blow out the candles 吹蜡烛
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.
当你生病的时候你也可以擤鼻子。
What do you blow your nose with when you've got a cold?
你感冒时用什么擤鼻涕?（素材来自网络，如有侵权请联系删除）