In the nose, cilia help to drain mucus from the nasal cavity down to the throat.

比方说鼻子，纤毛可以帮助粘液从鼻腔流到喉咙。

youdao

In the nose, cilia help to drain mucus from the nasal cavity down to the throat.

比方说鼻子，纤毛可以帮助粘液从鼻腔流到喉咙。

youdao