Some groups that had descended from the same parent population were no longer reproductively compatible—they had evolved into separate species.
一些由同一亲本群体进化而来的群体在繁殖上不再相容——他们进化成了不同的物种。
The second parent is picked at random from the parent population.
另一个双亲是随机地从双亲人群中挑选的。
The article discusses the physical and chemical features of expansible graphite and its parent population---general graphite.
详细论述了膨胀石墨及其母体普通石墨的物理、化学特性。
The article discusses the physical and chemical features of expansible graphite and its parent population---general graphite.
详细论述了膨胀石墨及其母体普通石墨的物理、化学特性。
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