We observe closely related species in sympatry and infer how they evolved from a common ancestor.

We observe closely related species in sympatry and infer how they evolved from a common ancestor.

我们在同域观察密切相关的物种，并推断它们是如何从一个共同的祖先进化而来的。

-- Peter Raymond Grant 彼得·雷蒙德·格兰特