I must learn to bite my lip.

我必须学会不随便说话。

《柯林斯英汉双解大词典》

I tightly bite lower lip, a words also can no say it.

我紧咬着下唇，一句话也说不出来。

youdao

At me why bite the lip, As saying, speak not?

为何咬我的嘴唇，说：别出声？

youdao

I know, I just want to bite his bottom lip.

我想用我的嘴一到你的嘴唇边。

youdao

I know, I just want to bite his bottom lip.

我想用我的嘴一到你的嘴唇边。

youdao