But what if you are able to find identical twins who were separated at birth, and reared in radically different environments.

如果你能找到，出生时就分开了的,同卵双胞胎，在完全不同的环境里长大。

哈佛公开课 - 幸福课课程节选

And you look at those who are reared apart.

研究那些被分开抚养长大的同卵双胞胎。

哈佛公开课 - 幸福课课程节选