Generally, however, such animals pose little threat to the human population.
不过总体而言，这些动物对人群构成的威胁并不大。
The human population took roughly 250,000 years to reach 1 billion (in about 1800).
人类花了25万年人口才达到10亿（大约在1800年左右）。
Aneuploidy in human population is a serious genetic problem.
在人类群体中非整倍性是个严重的遗传问题。
Of course, who can judge the right number for human population?
当然，谁能判断人口的合适数量呢？
They are highly polymorphic among human population and inherited in a stable manner.
在人群中，它们呈现高度多态性，并且稳定遗传。
The essential reason for the extinction of rhinoceros in China was human population pressure.
犀牛在中国灭绝的根本原因是人口压力。
The essential reason for the extinction of rhinoceros in China was human population pressure.
犀牛在中国灭绝的根本原因是人口压力。
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