雄性动物对付顿饭就个体生存了。雌性需要有一定的条件才会产仔,延续种群。雌性动物的这种先天挑剔是社会发展的动力
雄性动物对付顿饭就个体生存了。雌性需要有一定的条件才会产仔,延续种群。雌性动物的这种先天挑剔是社会发展的动力
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