• The American Anthropological Association in 1998 stressed that neighboring populations interbreed and that physical traits tend to vary gradually rather than abruptly over geographic areas.

    1998年美国人类学协会为了邻近种族的杂交生理上特征有非常逐渐不是突然地跨过地理区域感到很紧张

    youdao

  • The American Anthropological Association in 1998 stressed that neighboring populations interbreed and that physical traits tend to vary gradually rather than abruptly over geographic areas.

    1998年美国人类学协会为了邻近种族的杂交生理上特征有非常逐渐不是突然地跨过地理区域感到很紧张

    youdao

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