We make inferences to the existence of things we can't see, when doing that helps us to explain something we can't otherwise explain.

我们推断一些看不到的事物的存在,因为这样做可以便于我们,解释某些我们不相信就无法解释的事情

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This helps us to explain, for instance, why in so many cultures the concept of saving face is so important, even if to most modern Americans it seems relatively trivial.

这就很容易解释，为什么很多文化里的面子问题,会变得那么重要，而对许多美国人来说,那都是小事一桩。

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There's nothing that helps us explain why this event took place.

BBC: Maureen and Mark Tyler

It probably also helps explain why US retail investor confidence today stands at a record low.

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All this helps to explain why the US administration has been taking a close personal interest in the eurozone's troubles - and why the US has been making it clear that it would prefer there weren't a "credit event" that could be described as a Greek default.

BBC: Eurozone woes are US woes