I was a mother at the age of nineteen.

我在十九岁的时候当了妈妈。

youdao

At the age of nineteen I was diagnosed with Melanoma Cancer.

19岁的时候，我被诊断为患有黑色素瘤。

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Now when Milton publishes this poem, he makes it clear that it was written at age nineteen.

那时当弥尔顿要出版诗歌的时候，他就清楚自己是在19岁时写的。

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Frank McCourt left Ireland at the age of nineteen to return to New York City where he was born.

VOA: special.2009.12.27

Now when Milton publishes this poem, he makes it clear that it was written at age nineteen.

那时当弥尔顿要出版诗歌的时候，他就清楚自己是在19岁时写的。

耶鲁公开课 - 弥尔顿课程节选

Not until the nineteen fifties did scientists, using radioactive dating, place the age of the Earth at over four billion years.

VOA: special.2009.12.01

But he stopped producing foals and was sent to slaughter by his owners at age nineteen.

FORBES: Racing Industry Silent About Slaughtered Thoroughbreds