尽管表情变化的速度很快，我们还是可以读出微笑是否反映了真正积极的情绪。
Despite the speed with which faces move, we can read whether or not smiles reflect real positive emotions.
因为一个人的语音语调或面部表情经常反映了他的情绪，而在其余类型的沟通中我们很难看到一个人的表情的微妙变化。
Because a person's tone of voice or facial expression often reflects his mood while in other kinds of communication it's hard for us to perceive the subtle changes of one's emotion.
因为一个人的语音语调或面部表情经常反映了他的情绪，而在其余类型的沟通中我们很难看到一个人的表情的微妙变化。
Because a person's tone of voice or facial expression often reflects his mood while in other kinds of communication it's hard for us to perceive the subtle changes of one's emotion.
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