They study pairs of identical twins who grew up in different surroundings, like Jim Springer and Jim Louis.

他们研究了像吉姆·施普林格和吉姆·路易斯一样在不同环境中长大的同卵双胞胎。

youdao

youdao

They cited a study presented earlier this year of 249 pairs of parents and their children in which twice as many children as parents wanted rules on what parents could share.

他们引用了今年早些时候的一项研究，这项研究面向249对父母及其孩子进行，其中希望对父母分享的内容进行规定的孩子数量是父母的两倍。

youdao

The colony contained about 500 breeding pairs and, averaged over the study's two years, herons caused the failure of 169 nests a year at the colony's centre, but only 92 a year at its edge.

ECONOMIST: Animal behaviour

The study looked at 1, 255 pairs of mothers and children from 1999 to 2002.

BBC: C-section 'may double risk of childhood obesity'

Mr Plomin has also set up a study working with 10, 000 pairs of identical and non-identical twins in Britain.

ECONOMIST: WHAT WE LEARN FROM TWINS