Before he was president, Mister Hoover worked for many years to make the construction of the dam possible.

VOA: special.2009.08.12

By your estimation, how many more years before we will see Afghan National Army and the police force in enough numbers to stablize the country?

根据您的估计，还要多少年,才能有足够的阿富汗国民士兵和警察,来维持这个国家的安定？

普林斯顿公开课 - 国际座谈会课程节选

Very high correlation between the two which in many ways gives credence to the many years of research that has been conducted, before we have the technology to do it in a more sophisticated way.

两者有很大关联，这在很多方面,给多年来进行过的研究提供了可信度，在拥有技术进行更全面的研究之前。

哈佛公开课 - 幸福课课程节选

She had died so many years before him that local tradition noted very little of her existence.

VOA: special.2009.10.31

Other men,also looking for gold, had reached the Stanislau hills of California many years before I did.

VOA: special.2009.07.04

Instead,it belonged to a tyrannosaurid species that lived many millions of years before its T.Rex relative.

VOA: special.2009.10.13

But it would be many years before there were musical recordings or regular radio broadcasts.

VOA: special.2009.02.08

Susan's father had worked many years for other candy companies before starting this one.

VOA: special.2009.03.29

"Rosabelle" was the name of a song that Bess had sung many years before.

VOA: special.2010.12.19

Many of his most famous books were written before he was thirty years old.

VOA: special.2010.04.09

For many years before that,however, he had been considered a failure.

VOA: special.2010.02.11

Calvin's wife had died many years before.

VOA: special.2009.03.07

He spent many years at Amoco, before it merged with BP.

VOA: standard.2010.07.27