Such is natural rule, that the fittest can survive.

这是大自然的规则：适者生存。

youdao

As asserted by Darwin, only the fittest can survive.

正如达尔文所言，物竞天择，适者生存。

youdao

As asserted by Darwin, only the fittest can survive.

正如达尔文所言，物竞天择，适者生存。

youdao