You need insurance on both parents because both parents are contributing to the success of the children.

之所以父母双方都要购买保险,是因为父母双方都对,孩子的成长起着重要的作用

耶鲁公开课 - 金融市场课程节选

He's, he's from Guam though, but both of his parents are born in Korea and he speaks fluent Korean.

他来自关岛，但他的父母都出生于韩国，他的韩语也很流利。

关于旧金山大学校园 - SpeakingMax英语口语达人

Both his parents are psychologists and he hates these questions and at times he just screws around with us.

他的父母都是心理学家,他恨透了这些问题,所以他会时不时的忽悠我们一下。

耶鲁公开课 - 心理学导论课程节选

Now if you were not born in the United States, you may still be, under definition, a natural born US citizen if you're born outside this United States, both of your parents are citizens of the United States and at least one parent has lived in the United States.

现在如果你不是出生在美国，你可能,即使你出生在美国以外的地方,只要你的父母都是美国公民,而且至少一个居住在美国,那么按照定义。

麻省理工公开课 - 计算机科学及编程导论课程节选