On a hot day many years ago my the-middle school daughter Emily, one of the most optimistic people I know, was paddling with me in a cardboard boat race.

数年前一个炎热的日子里，我那上中学的女儿艾米丽——我所认识的最乐观的人之一，和我一起参加划纸板船比赛。

youdao

I know the degree of master meant many years of assiduous study and hard work.

我知道这个硕士学位代表着你多年来的勤奋学习和辛苦工作。

youdao

I don't know how many years without holidays.

我不知道有多少年没有假期了。

youdao

One of the stories that is often told is the goldsmith banker's story that goes back I don't know how many hundred years.

经常被人们提起的一个故事是,金匠银行家的故事,它可以追溯到,我不知道是几百年以前了

耶鲁公开课 - 金融市场课程节选

I don't know how many years it was.

我忘了是多少年前。

艺术画廊，来吧 - SpeakingMax英语口语达人

Ah, many of you have seen it, it's a great film. It's a true story, it's about Fountainebleu, which is southeast of Paris, sort of a fancy place, and it's about his childhood about French schools. My kids have been in French schools for many years so I know about these places.

人不少啊,是部好电影,是真实的故事改编的,关于枫丹白露,在巴黎东南,一个豪华的地方,关于他童年的,你会学到关于法国学校的事,我孩子在法国,学校念了好多年所以我知道

耶鲁公开课 - 1871年后的法国课程节选

In the last - I don't know how many years, I'm guessing, maybe 50 years - there's been a drop, for adults, in sleep.

NPR: 10 More Possible Triggers to Obesity

That's really all changed in the last - oh, I don't know how many years, but I would say probably 15, 20 years.

NPR: Former Vegetarians Start Magazine About Meat

Having coached women in business for many years, I know how much we women have to contribute to the world.

FORBES: Women: Enough With The Apologies!