Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种变
慢
，但不以同样速度变--一些如海豆芽一样生物从最早石以来未发生改变。
Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种变慢，但不以同样速度变--一些如海豆芽一样生物从最早石以来未发生改变。
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