The original population of four in 1981 is estimated to be at least 80 now.

据估计，1981年原种群的4只河马如今至少繁殖为80只。

Now what are these, in terms of the original population distribution?

现在，就原始人口分布而言，这些是什么？

In fact, our standard deviation became smaller than our original population distribution, or our original probability density function.

事实上，我们的标准偏差变得小于我们原来的人口分布，或者我们原来的概率密度函数。

Actually, it's much more likely that today's English people are mostly descended from the original Celtic population.

实际上，更有可能的是，今天的英国人大多是原始凯尔特人的后裔。

It often happens that the original population adopts the language of a new politically dominant group as their own.

原始人口采用新的政治主导群体的语言作为自己的语言的情况经常发生。