这就是生存的自然法则。

It is part of the natural mechanisms for our survival.

youdao

这种方法一时间非常有效，但接着蚊子重磅回击——大自然的生存法则让蚊子大军有了抗杀虫剂的良好基因。

For a time, it was successful, but then evolution struck back, as natural selection favoured the spread of insecticide-resistant genes.

youdao

因此每一种生物都有它存在的意义，它们都在以自然的法则生存。

So each has its biological significance of the existence, they are in the natural law of survival.

youdao