I have a ten-year-old in school.

我有个十岁的孩子在上学。

《牛津词典》

When I was a 9-year-old boy, I once decided to run away from home.

当我还是个9岁的小男孩时，我曾经决定离家出走。

youdao

Back in the exam room, with that 8-year-old, I took some early and unsure steps toward discussing the topic.

回到体检室，和那个8岁的小朋友，我采取一些早期不确定的步骤去讨论这个话题。

youdao

I'm 48 years old. In the New Year, I just hope things start to get right again.

VOA: special.2009.01.01

She was, I don't know, ninety and she married some sixty-year-old Confederate veteran at some point in time.

她大概有,大概有,九十岁,她在某个时期嫁给了一个,六十岁的南部邦联老兵

耶鲁公开课 - 美国内战与重建课程节选

She wasn't old. I reckon she was 40 year old, but she was so ugly.

她并不老，我想她当时大概是40岁，但是她长得很丑。

耶鲁公开课 - 1945年后的美国小说课程节选

As a former elementary school teacher and a dad of a 12 year old I know first-hand about how teaching and learning is quickly moving into a digital environment.

FORBES: Educators Dive into Digital

At 40, I am ancient, old to a 20 year old, but I am delightfully spry to a 60 year old.

FORBES: Social Media Marketing: Be Careful What You Wish For, You Just May Get It

And with my 70 year old old man, I watch Chevy Chase in Christmas Vacation.

FORBES: Lessons On Surviving The Holidays From National Lampoon's 'Christmas Vacation'