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1·the survival of the fittest, a slogan that virtually preempted all debate.

“适者生存”，一个几乎无可辩驳的口号。《柯林斯英汉双解大词典》

2·Natural selection ensures only the fittest survive to pass their genes on to the next generation.

物竞天择确保只有最适应环境的物种才得以生存下来，把基因传递给下一代。《柯林斯英汉双解大词典》

3·With the changes in the world's climate, dinosaurs died, but many smaller animals lived on. It was the survival of the fittest.

随着世界气候的变迁，恐龙绝迹了，但许多较小的动物却继续活了下来。这就是适者生存。《新英汉大辞典》

4·Survival of the Fittest.

适者生存。

5·What's Survival of Fittest and how it works?

什么是适者生存理论，它又是如何发挥作用的呢？

6·I didn't have the Survival of the fittest attitude.

我没有树立“适者生存”这一观念。

7·I don't want to totally thwart survival of the fittest.

我不想完全抵制适者生存。

8·Such is the rule of nature that: the fittest survive.

大自然的一条基本定律是适者生存。

9·We are now live in the world where the fittest will survive.

现如今，我们生活在一个适者生存的世界里。

10·There are extreme arid regions where only the fittest survive.

这里是极端干旱地区，只有适者能够生存。

(1)survival of the fittest适者生存