The timbre of the violin is far richer than that of the mouth organ.

小提琴的音色比口琴的音色丰富得多。

《柯林斯英汉双解大词典》

This gesture mimes the closing of the mouth.

这个手势模仿的是嘴巴的闭合。

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Many carnivorous dinosaurs have ambiguous features, such as "peg-like" teeth at the front of the mouth, or no teeth at all.

许多食肉恐龙的特征并不是很明显，例如，要么在嘴的前部有“钉状牙齿”，要么就根本没有牙齿。

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Cleft palate is a separation in the top of the mouth.

VOA: special.2009.12.22

It seems to be in the vicinity of the mouth.

它好像在嘴的附近

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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

One of the universally understood facial gestures is disgust, involving a downturn of the mouth.

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Take the full-grown moustache, for example, with down-turned ends at the corner of the mouth.

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They can be found anywhere on the skin or even on the gums of the mouth.

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