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来源:雅诚德英语网
Scientists had believed that this birth position evolved in the primate ancestors of modern humans.
科学家们一度以为这种生产姿势是从现代人类的灵长类祖先进化而来的。
Scientists had believed that this birth position evolved in the primate ancestors of modern humans.
科学家们一度以为这种生产姿势是从现代人类的灵长类祖先进化而来的。