Laughter research has found that only a small percentage oflaughter, less than 20%, is a sincere response to someone's humor.
对笑容的研究表明只有小部分—不超过20%的笑容是发自肺腑的对于某人幽默的回应A&=TfxDvY!94nv-。
In fact, laughter is primarily asocial signal, as opposed to an emotional outburst.
事实上，笑容主要是一种社交讯号，而非感情释放r9!_rxmFH|JMj。

People are 30 times more likely to laugh in a group setting than when they are alone, leadingobservers to conclude laughter has a primarily social function.
人们在人群中笑的次数是他们在独处时的30倍甚至更多，使研究人员由此推断笑容首先具有一种社交作用|Jr-!TlvM8。
For instance, there's “polite” laughter. How often have you found yourself laughing at someone'sattempt at being funny in order to spare their feelings or make them feel good?
例如，“礼节性”的笑容EibQw(0eQrK(Z。你发现你有多少次对别人试图表现的幽默报之一笑，只是为了照顾他们的情绪或者让他们感觉更好？
Research has also found that women tend to laugh a good deal more than men.
研究还发现女人比男人发笑的次数更多sQH8IMiJHss。
And malespeakers tend to elicit more laughter than female speakers.
而男性演说家比女性更倾向于逗人发笑8k837em_t8QEWeIr。
Laughter may very well be a sign of power dynamics between people, signaling dominance andsubmission, acceptance and rejection.
笑容是人们之间一个非常好的权力演变信号，代表支配和屈服，接受和拒绝2#8leRoF2_@O2。
Certainly, that seems to be the case when someone islaughing at you rather than with you.
当然，这似乎出现在当别人嘲笑你而不是和你一起笑的情况下KrhR!Ww=))y2r#q8ci。