All of the members in one group are more closely related to each other than to any of the other groups, like how a parent or sibling is more closely related to you than, say, your fifth cousin twice removed.

一个群体中的所有成员彼此之间的亲缘关系比与其他任何群体的亲缘关系都要密切，就像父母或兄弟姐妹与你的亲缘关系比你隔两代的第五代表亲更密切一样。

Interestingly, Eleanor Roosevelt was actually the niece of Franklin Delano Roosevelt's fifth cousin, who was another U.S. president, Theodore Roosevelt – or " Teddy Roosevelt" as we more popularly know him – the 26th president of the United States.

有趣的是，埃莉诺·罗斯福实际上是富兰克林·德拉诺·罗斯福的第五个堂兄的侄女，他是另一位美国总统西奥多·罗斯福——或者我们更普遍地知道的“泰迪·罗斯福”——美国第 26 任总统。