名词
中文翻译：Unknown
同义词：
['facial expression', 'facial change', 'face change']
例句：
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1. The way she smiles can tell you a lot about her personality.
她微笑的方式可以告诉你很多关于她个性的事情。
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2.His facial expression changed as he realized the mistake.
当他意识到错误时，他的表情变了。
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3.The facial changes were so subtle that only a trained eye could notice them.
面部的变化非常微妙，只有经过训练的眼睛才能注意到。