"After 20 years of working with students, we are seeing unprecedented levels of engagement and creativity like we have not seen in 20 years,"

VOA: standard.2009.12.08

In that year, we were early on in terms of diversifying the portfolio -we'd only been working on that program for two years -and even so,the negative return was less than 1%, so it was a modest negative return.

在那一年,我们还处于投资组合多元化的初期,刚刚开始2年,即便如此,股灾时我们的亏损小于1%,这只是一个轻微的亏损

耶鲁公开课 - 金融市场课程节选

I had been working at a public Accounting firm for a couple of years.

我在一家会计事务所已经工作了几年。

为什么是会计学呢？ - SpeakingMax英语口语达人

Darwin had been working on his theory for over twenty years when he published " On the Origin of Species."

VOA: special.2009.12.01

He was seventy years old and still working as the marshal of Cromwell,Oklahoma.

VOA: special.2010.03.10

During his seventy-two years he was one of America's most hard-working musicians.

VOA: special.2009.08.02

"In the last three years, the people of this country have been working to promote reform, reconstruction,and reconciliation.

VOA: standard.2009.08.14