How come some people's smiles are better than other people's smiles?
为什么有些人微笑比另一些人更好？
Yes, most people produce fake smiles some of the time, usually to be polite.
是的，大多数人有时候都会假装微笑，通常是为了礼貌。
Some still say it was their fault, but Paul just smiles.
有人说这是他们的错，但保罗以笑回应。
Some of these smiles have nothing to do with being happy at all.
这些笑容有的跟心情愉快一点关系也没有。
Some of these smiles have nothing to do with being happy at all.
这些笑容有的跟心情愉快一点关系也没有。
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