Racial purity is very very rare.

纯种是非常非常稀有的。

youdao

As the mother of a mixed-race child and as a scientist, I wanted to challenge these ideas of racial purity.

作为一名混血儿的母亲和一位科学家，我要挑战这些种族纯洁性的思想。

youdao

The mixing of RACES (or miscegenation) was usually considered as something to be avoided in the name of racial purity.

种族混合(或通婚)通常被认为是要避免的，以保持种族的纯度。

youdao

And he was especially obsessed with racial purity.

他尤为看重纯正的种族血统

耶鲁公开课 - 美国内战与重建课程节选

And he repeated and said, no, you know, we have a couple of members who are not white who just, you know, agree with our ideals of racial purity.

NPR: How Will Bachmann's Departure Affect Politics?

Above all is North Koreans' sense of racial purity.

ECONOMIST: North Korea after Kim Jong Il