Tom had a fall and his under lip began to swell up.

汤姆跌了一跤，下唇开始肿起。

youdao

To raise and turn under(the upper lip), as in snarling or showing scorn.

撇嘴，翘嘴翘起或撇起（上嘴唇），如在咆哮或表示轻蔑时。

youdao

I use this under a lip gloss for the SPF factor.

我用在唇彩前，可以防晒。

youdao

I use this under a lip gloss for the SPF factor.

我用在唇彩前，可以防晒。

youdao