The eldest son is being groomed to take over when his father dies.

长子正在接受培养，以在父亲过世后接手父业。

《牛津词典》

I am going to spare both the father and the son.

我会可怜你们父子俩的。

youdao

The father is neither kind nor cruel to his son.

这位父亲对他的儿子既不仁慈也不残忍。

youdao

Kallawaya is passed down within families from father to son as a way of protecting the special knowledge of healers.

VOA: special.2009.12.02

And as you read the story, remember its larger context: God's promise to make Abraham the father of a great people through his son, Isaac.

当阅读这个故事时，记住它的大框架：上帝许诺,亚伯拉罕通过他的儿子以撒成为大国之父。

耶鲁公开课 - 旧约导论课程节选

Something like video games. So kids play video games but this model shop may continue to sell these complicated models. The next I want to show you is a sight I explore father-son relationship.

所以孩子们玩电子游戏,而这家模型店继续卖这些,复杂的模型，下面我要展示给你的是,是我探索父子关系方面的一段视频。

麻省理工公开课 - 媒体、教育、市场课程节选

It would be based only on a tiny hope, because it would take a miracle for the son to step out of the father's shadow.

ECONOMIST: The North Korean succession

Some families do to their son whatever was done to the child's father so father and son will look alike.

CNN: Circumcising our son -- How do we decide?

His son was wanted for armed robbery, and when the police had not been able to find his son they had decided to lock up the father.

NEWYORKER: Cell One