adopt an orphan

• 收养一个孤儿

adopt an orphan的用法和样例：

例句

1. As they had no children of their own, they adopted an orphan.
   他们没有亲生儿女，就收养了一个孤儿。
2. Having no children of their own they decided to adopt an orphan.
   他们因没有亲生儿女，所以决定领养一个孤儿。