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Laughter research has found that only a small percentage of laughter, 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。
In fact, laughter is primarily a social 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。
People are 30 times more likely to laugh in a social situation than when they are alone, and other observation is about laughter also imply it has a 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。
For instance, there's “polite” laughter. How often have you found yourself laughing at someone's attempt at being funny in order to spare their feelings or make them feel good?
例如，“礼节性”的笑容。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?
译文来自可可英语
