把这一句，留给此刻的你

I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection, in order to mark its relation to man’s power of selection.

我把这一原则称为自然选择原则，根据这一原则，每一个微小的变化，如果有用的话，都用自然选择的术语加以保留，以便标明它与人类的选择能力之间的关系。

— Charles Darwin 查尔斯·达尔文