George Gershwin had his first big hit in nineteen nineteen, when he was twenty-one years old.

VOA: special.2009.02.08

For next time, make sure that you will have read at the very least Milton's great poem, and he wrote it when he was only twenty-one years old, "The Ode on Christ's Nativity."

下一讲，同学们至少要读完,弥尔顿的一首伟大诗作，他写这首诗时才21岁，《基督降生颂歌》

耶鲁公开课 - 弥尔顿课程节选

Composed 1629" -- whether or not that's actually true, and there's some controversy about that -- but nonetheless, the subtitle announces to all who know John Milton that the poet was twenty-one years old at the moment of its composition and that he had therefore just reached his majority.

作于1629“-不管它是否属实，尽管对此也有一些争议，但它向所有知道他的人宣告,诗人创作这首诗时只有21岁,因此他已经超过了多数同龄人。

耶鲁公开课 - 弥尔顿课程节选

His name was Jacob Riis. He was just twenty-one years old.

VOA: special.2010.08.01

They married in nineteen sixty-seven, when she was twenty-one years old.

VOA: special.2010.04.04

They are now thirteen to twenty-one years old.

VOA: special.2009.06.01

The winner,Maya Lin,was twenty-one years old.

VOA: special.2009.05.25