When a student's grades hit bottom it is time to hit the books.

VOA: special.2009.09.20

It is being written and redacted at a time when there is a king in Israel, there have been kings in Israel, and it is providing laws for the construction of an ideal monarchy.

它是在以色列有国王的时候写成并编辑的，以色列曾有过国王，它为建立君主理念提供了律法。

耶鲁公开课 - 旧约导论课程节选

In each set, the first plague is accompanied by a notation of the time in the morning. It's also introduced by God's speech, when God says, "Present yourself before Pharaoh," and to do this in the morning.

在每一组中，第一次瘟疫都是发生在早上,可以从上帝的话中看出来，上帝说，今天早晨，“到法老面前去“

耶鲁公开课 - 旧约导论课程节选

And,these are occurring at a time when the global economic crisis is making it more difficult to maintain good health, especially in the developing world.

VOA: standard.2009.05.18

The violence represents an effort to undermine Iraqi authorities, to undermine them at a time when it is widely understood that U.S.forces are beginning a departure.

VOA: standard.2009.09.10

"When it is all said and done, I think it is time for a 'do over'. We need to start this budget process all over again.

VOA: standard.2009.03.24

"This is at a time when we are working to relaunch negotiations and we believe that these actions make it more difficult for our efforts to succeed.

VOA: standard.2009.11.17