物竞天择，适者生存，优胜劣汰用英语怎么说

物竞天择，适者生存，优胜劣汰

Survival of the fittest in natural selection, survival of the fittest, the survival of the fittest

物竞天择，适者生存，优胜劣汰

Survival of the fittest in natural selection, survival of the fittest, the survival of the fittest