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It's hard to say exactly why you like someone. 有时候，我们很难讲清为什么会喜欢某个人。 Maybe it's their goofy smile; maybe it's their razor-sharp wit; or maybe it's simply that they're easy to be around. 也许是因为他们憨厚可人的笑容；也许是因为他们的聪慧机敏；也许仅仅只是因为他们很好相处。 But scientists generally aren't satisfied with answers like that, and they've spent years trying to pinpoint the exact factors that draw one person to another. 但是科学家们并不满足于这个答案，于是他们花费了数年来研究到底是哪些因素将人与人联系在了一起。 Below, we've rounded up some of their most intriguing findings. Read on for insights that will cast your current friendships in a new light — and will help you form better relationships, faster. 下面，我们汇总了一些他们的有趣发现。阅读过后，你或许会对自己现阶段的友情产生新的认识，也许这篇文章将帮助你迅速建立更好的人际关系。 | 
