物竞天择势必至,不优则劣兮不兴则亡 英文怎么讲？

the fittest in natural selection can suvive; if not the best, they must be the worst, similarly, if not thrive, perish.

The fittest in natural selection can suvive; if not the best, they must be the worst, similarly, if not thrive, perish.

达尔文讲的，应该是你想要的吧，其他的都太Chinglish了
survival the best
前面还有一大堆，就看你要不要了，这句话是进化论（theory of evolution）的精华。