But it grows pretty rapidly, as n goes up, and I'm going to show you an example in a second.

解决问题需要的时间会急剧增长，一会儿我会让大家看个例子的,我想大家注意的还是。

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Then what happens is the population grows, and for this the archaeological evidence is very strong.

然后你会发现人口在急剧的增长,有很多考古证据都可以有力的证实这一点

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