As James Fowler, professor of medical genetics at UC San Diego says, " Most people do not even know their fourth cousins but somehow manage to select as friends the people who resemble our kin."
正如加州大学圣地亚哥分校医学遗传学教授詹姆斯·福勒所说:“大多数人甚至并不认识他们的第四代堂兄弟姐妹,但是某种程度上,却成功地选择了那些像我们亲戚的人们作为朋友。”