笑，其实是一门认真的科学
Laughter seems like one of the simplest human acts. Something amuses us, and out it comes, uninvited and often uncontrollable. Yet behind this everyday sound lies a surprisingly complex piece of biology and social life.
笑，似乎是人类最简单的行为之一。有什么逗乐了我们，它便脱口而出，不请自来，还常常控制不住。然而在这日常的声音背后，藏着一套出人意料地复杂的生理与社交机制。
One striking discovery is that we rarely laugh alone. Studies show that people are far more likely to laugh in the company of others than by themselves, even when watching the very same funny clip. Laughter, it turns out, is less about jokes and more about connection. It is a signal that says, in effect, we are safe together.
一个引人注目的发现是：我们很少独自发笑。研究表明，人们在有他人相伴时比独处时更容易笑，哪怕看的是一模一样的搞笑片段。原来，笑与其说和笑话有关，不如说和联结有关。它是一种信号，实质上在说：「我们在一起，很安全。」
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