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。

youdao

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。

youdao

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。

youdao

One family in five in social housing is headed by a single parent, triple the percentage of the population at large.

ECONOMIST: Urban policy

Ms. LINDA REEDY (Gay Parent): It's as if a whole segment of the population of the country and maybe the world are telling me personally that I'm not fit to be a parent, when I know that every day, my whole life is about being a parent.

NPR: Religious Exemption Sought for Gay Adoption Law

Nymex Holdings (nyse: NMX - news - people ), the parent of energy trading giant New York Merc, is slashing costs over the next three months, specifically targeting the population of its trading floor, which has seen volume dwindle as more contracts are traded through an electronic alliance with the Chicago Mercantile Exchange (nyse: CME - news - people ).

FORBES: Trading Partners