Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种
是缓慢
，但不是
同样速
--一些如海豆芽一样生物从最早石
发生改。
Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种是缓慢，但不是同样速--一些如海豆芽一样生物从最早石发生改。
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