互联网搜索中，只要移动光标，鼠标一点，信息就源源不断地出来了。

With that blinking cursor on our Internet search box only a button away and ever ready to unleash a geyser of electronic information, no longer do we have to go into any encounter wholly unprepared.

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只要一点唾液样本，我们就能准确推定出一个人的年龄，而无需任何其他信息。

With just a saliva sample, we can accurately predict a person's age without knowing anything else about them.

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因此，只要知道了一定类型的信息，我们就可以直接做到这一点。

So we can do this directly as long as we have certain types of information.

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