he saw that his total was $254

发布网友发布时间：2023-08-10 12:36

共2个回答

热心网友时间：2024-12-03 16:56

Populations of a species that are spread out over a broad geographical range are often arrayed in a cline-a graal change in one or more characteristics as each population evolves adaptations to its own local environment. Along a cline, subspecies with distinct characteristics may arise. Often, indivials at either end of a cline are reproctively isolated.
地域上分布很广的种的群体中，经常存在变异群，因为适应当地的环境，每个群体逐渐产生一个或多个与众不同的特点。在变异群中，带有明显特征的亚群可能产生。通常，在两个变异群中的个体是繁殖隔离的。

热心网友时间：2024-12-03 16:57

he saw that his total was $254
他看到他的总数是254美元

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