[医] 自然选择, 自然淘汰

词型变化：名词复数形式 : natural selections

natural selection的用法和样例：

例句

用作名词(n.)

Natural selection is a very grim natural reaper.自然选择是自然界的冷酷收割机。
It stops natural selection and genetic survival dead in its tracks.大意指将会停止自然选择适者生存。

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