Experts say that laughter increases endorphins, strengthens your immune system, and sends extra oxygen coursing through your veins.
专家声称，大笑可以提高内啡肽水平、强化免疫系统、增加血管中的氧气含量。
Experts say that laughter increases endorphins, strengthens your immune system, and sends extra oxygen coursing through your veins.
专家声称，大笑可以提高内啡肽水平、强化免疫系统、增加血管中的氧气含量。
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