It occupies a special place in social interaction and is a fascinating feature of our biology, with motor, emotional and cognitive components.
笑在社会交往中占据重要的位置，是人类生物学中一个迷人的特征，包含了运动、情绪和认知成分在内。
It occupies a special place in social interaction and is a fascinating feature of our biology, with motor, emotional and cognitive components.
笑在社会交往中占据重要的位置，是人类生物学中一个迷人的特征，包含了运动、情绪和认知成分在内。
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