我们通常认为自然选择（理论）是达尔文的伟大思想发现。

Natural selection is what we normally think of as Darwin’s big idea.

youdao

达尔文的自然选择理论正是为了回答这个问题。

Darwin's theory of natural selection is intended to answer this question.

youdao

达尔文所理解的也就是自然选择，物竞天择。

All Darwin perceived was that selection must work in nature, too.

youdao

这是达尔文的自然选择原则的行动。

It's Darwin's principle of natural selection in action.

youdao

这是达尔文的自然选择原则的行动。

It's Darwin's principle of natural selection in action.

youdao