Because that will give you some kind of evidence as to which one you take to be you.

因为那样就能给你一些提示,让你知道哪个是你认为的真正自己。

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I don't know. There's evidence that the coy smile shows up in non The question was, "Do nonhuman primates give the same smiles that humans do?

我不知道，有证据表明,腼腆微笑在非人类,问题是，灵长类和人类微笑相同吗？

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