有些练习可以让面部肌肉紧绷起来。

There are exercises that tauten facial muscles.

《柯林斯英汉双解大词典》

面部肌肉的收缩既能影响人的内心情绪，又能将它反映出来。

The contraction of facial muscles both influences the internal emotional state and reflects it.

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事实上，不同的情绪状态会在面部肌肉和大脑中产生特定的脑电活动模式。

In fact, various emotional states give rise to certain patterns of electrical activity in the facial muscles and in the brain.

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You know, even some goes pass you on the street and you don't smile ostensibly you don't smile-- there are certain micro-muscles in your face that are moving that actually make you feel better.

即使路人与你擦身而过时，你没笑,表面上你没有笑-,但你面部的细微肌肉,会收缩，让你感觉更好。

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