Tūnyàn / shí / xiǎoshé / huì / cānyù / tiáojié / kǒuqiāng / hé / bíqiāng / zhījiān / de / tōngdào。

吞咽时，小舌会参与调节口腔和鼻腔之间的通道。

When swallowing, the uvula helps regulate the passage between the mouth and the nasal cavity.