It has been a sobering time for his government as 18 soldiers have been killed in Afghanistan this month.

VOA: standard.2009.07.22

Well a number of you have spent this past week playing with this particular tool which is a project the course has been working on for some time in an effort to make it easier and more social to actually shop for courses.

在过去的一周里,已经有一部分人开始使用这种特殊的工具了,这门课程一直在致力于这一工具的开发,目的是为了让课程变的更简单,选课更人性化。

哈佛公开课 - 计算机科学课程节选

It has been a busy time in outer space for the astronauts aboard the shuttle Atlantis and on the International Space Station.

VOA: standard.2009.11.30

Dieng says it is the first time that such a court decision has been put into action.

VOA: standard.2009.08.27