A:Crossed cousin marriage is not allowed in China.
表兄妹在中国是不允许结婚的。
B:It it true of many countries.
其他国家也是这样。
A:You know why?
你知道为什么吗?
B:Sure. If people are near in blood, they might pass on some genetic disease to the next generation.
当然知道,近亲结婚会给下一代带来某些遗传疾病。