SCIENCE STUDY

Be careful when you’re sneezing

作者：TEENS

为什么打喷嚏的时候不能憋着？

Ahchoo! During cold season, many of us can’t stop sneezing (打喷嚏). Some people may hold their nose and close their mouth when they sneeze. This is the polite thing to do. But it can be a bad idea sometimes. Do you know why?

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