Their sons were three and six respectively.

他们的儿子们分别是3岁和6岁。

《柯林斯英汉双解大词典》

They longed to see their sons.

他们渴望见到自己的儿子。

《新英汉大辞典》

We're their sons.

我们是他们的儿子。

youdao

The fact that Americans would be tired of having their sons and daughters at risk and in battle is not surprising,"

VOA: standard.2009.09.03

Practically, sons didn't all live in the same place with their father.

实际操作中，儿子并不全都和父亲住在一起。

耶鲁公开课 - 新约课程节选

So sons legally were still under their paterfamilias.

所以法律上儿子仍属于他们的家长。

耶鲁公开课 - 新约课程节选

The two brothers and their sons held managerial roles in one another's companies until last summer.

FORBES: Billionaires List

The board of Gokaldas Exports, the garment-maker, includes three brothers and three of their sons.

ECONOMIST: Are Indian companies ready to take on the world?

The suspects' parents told Russian state media that the FBI had been speaking with their sons.

CNN: FBI agents interviewed bombing suspect in 2011