I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.

I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.

我把这个原理称为“自然选择原理”，根据这个原理，每一个微小的变化，如果有用的话，都可以用“自然选择”这个词来表示。

-- Charles Darwin 查尔斯·达尔文