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。
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。
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。
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？
