N-1：near in blood 近亲

A:Cross-cousin marriage is not allowed in China.

A:姑表兄妹在中国是不允许通婚的。

B:It is true of many countries.

B：其他许多国家也是这样。

A:You know why?

A:你知道为什么吗?

B:Sure. If people are near in blood, they might pass on some genetic diseases to the next generation.

B：当然，近亲结婚会带给下一代某些遗传疾病的。