研究人员拥有关于四位“父母”——两位生身父母和两位领养父母——的数据，并用它来研究父母教育程度与子女教育程度之间的关联。
The researchers have data on all four "parents" - two biological and two adoptive - and use it to look at the correlation between the parents' level of education and the child's.
设想你是一个孤儿，不是你去领养你的养父母；而是他们领养了你。
If you're an orphan, you don't adopt parents; they adopt you.
如果一个男人领养了一个儿子，养子却对其养父母造成伤害，则这个养子将回到他的原来的家庭。
If a man adopt a son, and if after he has taken him, he injure his foster father and mother, then this adopted son shall return to his father's house.
应用推荐