她保持了三年的世界冠军头衔。

She held the title of world champion for three years.

《牛津词典》

这位画家至少具有三年的工作经验。

The painter has at least three years of working experience.

youdao

这是一项为期三年的灌溉工程。

It was a three-year water irrigation project.

youdao

It has a half-life of approximately three years at which time it stops decaying.

它生命的一半是三年,在三年的时候，它就停止衰亡。

麻省理工公开课 - 固态化学导论课程节选

The longest piece that I have been working on has been developed over the last three years.

我一直在写的一个最长的剧本已经写了三年了。

灵感从何处来 - SpeakingMax英语口语达人

Before becoming President Bush's White House Chief of Staff, he was President Bush's Director of the Office of Management and Budget for 3 years.

在成为布什总统的,白宫办公厅主任之前，他是布什总统的,白宫管理与预算办公室主任,任期三年。

普林斯顿公开课 - 国际座谈会课程节选