He spoke before signing an order to create the Task Force on Middle-Class Working Families.

VOA: special.2009.01.31

So why am I working hard in order to get that BCG job?

我为什么还要努力争取好工作？

哈佛公开课 - 幸福课课程节选

This is a picture of patch clamp, it's a device that engineers built to fasten onto individual cells in order to look at how molecules in the membrane of the cell are working, and I'll talk a little bit about that as we go along.

这是膜片钳的图片,工程师使用该装置固定单个细胞,由此观察,细胞膜中的分子怎样活动,在以后的课中我还会谈到这方面内容

耶鲁公开课 - 生物医学工程探索课程节选

(Speaking) He says police used to work to maintain order in the city, but now they working to meet the needs of the people.

VOA: standard.2010.01.26

The leader of the Liberal Democrats, Nick Clegg,said Friday his party and the Conservatives are working "flat out" in order to come to a deal.

VOA: standard.2010.05.10