He is the eldest of the brothers.

他是兄弟几个里面年纪最大的。

In ancient times, the eldest usually succeeded to his father's title.

在古代，长子通常继承他父亲的头衔。

His eldest son was entrusted with a great responsibility.

他的大儿子被委以重任。

Our eldest daughter has a career and a family, but our other daughter just wanders through life.

我们的大女儿已经有了工作和家庭，但小女儿的人生还很迷茫。

As the eldest of three siblings, I can vouch for that, so what’s holding you back?

我就是三个孩子中的老大，我跟你保证肯定会的。那在顾虑些什么呢？

Her eldest boy is at college.

她的长子在上大学。

David was the eldest of three boys.

大卫是3个男孩中年龄最大的一个。

Warren's eldest son is an art student.

沃伦的长子是一名学艺术的学生。

Tom is my eldest son.

汤姆是我的长子。

He made over the property to his eldest son.

他把财产传给了他的长子。