He started going bald in his twenties.

他二十几岁便开始谢顶。

《牛津词典》

In his twenties Roosevelt had sought work as a cowboy on a ranch in the Dakota Territory.

二十多岁时，罗斯福曾经到达科他地区的一个大牧场去找牧牛工的活儿。

《柯林斯英汉双解大词典》

A high proportion of crime in any country is perpetrated by young males in their teens and twenties.

在任何国家，很大比例的罪行都是十几岁和二十几岁的青年男子所为。

《柯林斯英汉双解大词典》

In the eighteen twenties, in the state of New York, a man named Joseph Smith started the Mormon religion.

VOA: special.2009.06.04

This goes back in time from the text we were discussing last time in the teens and twenties to 1901.

这要回到我们上次课所讲,他年少时直到1901的那段时期。

耶鲁公开课 - 现代诗歌课程节选

It's nice to be around a lot of young people. There's a lot of people in their twenties,

我很喜欢周围有许多年轻人。这儿很多人只有二十来岁。

喜欢环境法课程 - SpeakingMax英语口语达人

What ends up happening is that in our twenties and maybe even in our thirties, we can do pretty well in our work, even though it is not a passionate interest.

FORBES: Robert Greene: How to Become the Master of Any Skill

Recently, many books have been written about the state of people in their twenties, and the question that tends to crop up in them, explicitly or not, is: Well, whose twenties?

NEWYORKER: Semi-Charmed Life

They are mostly men in their twenties and thirties, some dressed in their British military uniforms waiting to go out on patrol.

BBC: Is the UK abandoning its Afghan interpreters?