野外生存用英语怎么写

　　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。

　　All living beings are endowed with an instinct for survival.

　　生物都有求生存的本能。

　　Perhaps then we would finally begin to live, rather than being concerned with bare survival.

　　也许到那时,我们最终会开始生活,而不是仅仅关心生存。