迷你对话：
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 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。
