美国巴尔的摩马里兰大学的罗伯特·普鲁文斯和他的同事做过一项典型的研究。根据他的研究，笑是一件极其严肃的事情。

According to a classic study of laughter by Robert Provine of the University of Maryland, Baltimore County, and his colleagues, laughter is an unexpectedly serious business.

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但是出人意料的是，仅有10%至15%的笑是由某个人的笑话引起的，美国巴尔的摩市的神经科学家罗伯特·布诺温(Robert Provine)介绍说。他已经研究笑几十年了。

But surprisingly, only 10 to 15 percent of laughter is the result of someone making a joke, said Baltimore neuroscientist Robert Provine, who has studied laughter for decades.

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但是出人意料的是，仅有10%至15%的笑是由某个人的笑话引起的，美国巴尔的摩市的神经科学家罗伯特·布诺温(Robert Provine)介绍说。他已经研究笑几十年了。

But surprisingly, only 10 to 15 percent of laughter is the result of someone making a joke, said Baltimore neuroscientist Robert Provine, who has studied laughter for decades.

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