Because if they are reared by the same parents,one could argue, "Well they came out very similar because same environment: they look the same; they go to the same schools; " same parents,and so on."

因为如果他们由相同的父母抚养，人们会说，“他们这么相似，是因为有同样的成长环境：,他们外表一模一样，上一样的学校;,有同样的父母，等等“

哈佛公开课 - 幸福课课程节选

They were reared in different countries, married similar wives,enjoyed drinking the same beer, called their children by the same names.

他们在不同的国家长大，娶了相似的妻子，喝同一种啤酒，为自己的孩子取相同的名字。

哈佛公开课 - 幸福课课程节选