Why do I have boogers ?
本文作者： TEENS
我们为什么会有鼻屎？We use our noses to breathe and smell. Our noses make a lot of “rubbish” every day. They make boogers.Boogers are very useful. They are dried mucus (干的黏液). Mucus is sticky (黏黏的). When we breathe, it can catch dirt and germs. |  |
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