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Jack Szostak works from the Harvard University Medical School, the Massachusetts General Hospital and the Howard Hughes Medical Institute.

VOA: special.2009.12.08

I don't know, I didn't go to business school so I'm not exactly sure how it works.

我不知道，我没在商学院上过学，所以我也不清楚它到底是怎样的。

哥伦比亚的氛围 - SpeakingMax英语口语达人

Here is how it works at London Towne Elementary School in Centreville,Virginia, outside Washington.

VOA: special.2010.06.17

What is clear to me is that what works for one school will not necessarily work for another.

FORBES: U.S. Sen. Michael Enzi

Deputy Fanning also works as a school resource officer at Lebanon's Sam Houston Elementary, reported CNN affiliate WSMV.

CNN: In just seconds, a boy, a gun, a death, then grief

Heber and his wife, who also works at the school, visited the hospital Friday and met with the father of the victim.

CNN: Teacher talks armed student into giving up, police say