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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They divide by n-1 to make it an unbiased estimator of the population variance, but I'm just going to show it in a simple way here.

当除以n-1表示的是对总体的,无偏估计,我在这里只是说的简单一点

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