They shout about not mixing races, not diluting culture, not diluting genes – about keeping races "pure".

他们叫嚣不要种族混合、不要冲淡文化、不要稀释基因——要保持种族“纯洁”。

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From the perspective of contemporary biology, humans show such a mixture of physical characteristics, that the "pure" RACES do not exist.

从当代生物学角度看，人类展现的是体质特征的混合，因此“纯”种族并不存在。

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An ever-increasing series of pure marriages across races and cultures would remake the relationship between man and God, for whom Mr Moon was now spokesman.

ECONOMIST: Sun Myung Moon | The