Darwin's great discovery was not the work of a moment but was preceded by years of patient, arduous observation.

达尔文的伟大发现不是一瞬间实现的，而是长年累月努力观察的结果。

youdao

Darwin's great discovery was not the work of a moment but was preceded by years of patient, arduous observation.

达尔文的伟大发现不是一瞬间实现的，而是长年累月努力观察的结果。

youdao