他二十岁时父亲就去世了。

His father died when he was only twenty.

youdao

他二十岁，她十八岁。

He is twenty, and she is eighteen.

youdao

他二十岁就已经是世界冠军了。

He had become an Olympic champion by the age of twenty.

youdao

Indeed, he was winning Grammys when he was in his twenties and has been recording sort of esoteric jazz and sometimes more pop jazz thereafter.

的确,他二十岁的时候得过格莱美奖,录过一些小众的爵士乐,之后还录过一些流行爵士乐

耶鲁公开课 - 聆听音乐课程节选

At age 20, he had a nervous breakdown.

二十岁时，他精神崩溃了。

耶鲁公开课 - 公正课程节选