His hand moved to his mouth as he tried to damp down the panic.

他用手捂住了嘴，试图使惊恐的情绪平静下来。

《柯林斯英汉双解大词典》

The story has been passed down by word of mouth.

这个故事是口头流传下来的。

《柯林斯英汉双解大词典》

He leaned down and kissed her lightly on the mouth.

他斜下身子，轻轻地吻了她的嘴。

《柯林斯英汉双解大词典》

I want to lie down." Henry was asleep almost before the words were out of his mouth.

VOA: special.2009.07.04

I move my hands around, my mouth is going up and down, it walks from one part of the stage to the other part of the stage.

我的双手可以挥舞,我的嘴唇可以翕张,我可以从讲台的一处,走到另一处

耶鲁公开课 - 死亡课程节选

Most of the time I walk down Fifth Avenue with my mouth just watering

很多时候，我在第五大道都是边逛边馋涎欲滴，

小心超额消费 - SpeakingMax英语口语达人

Currently doctors diagnose stomach cancer by taking a biopsy of the stomach lining using a probe and a flexible camera passed via mouth and down the gullet.

BBC: Stomach cancer 'spotted by breath test'

The biopsies can be done through an endoscopy, in which a fiber-optic tube is placed in the mouth and down into the small bowel or through some even less invasive procedures.

CNN: Does eating gluten cause eczema?

And after all that, optionally pour a few beer or sugar-laden coke down your mouth.

FORBES: The Thai Diet: 13 Ways To Stay Thin While Eating All Day