North Korea is warning the United States not to send surveillance planes too close to the site of a planned long-range rocket launch.

VOA: standard.2009.04.01

For now I want to tell you a little bit about what open course ware is and also share with you some work experience with our first public launch of the site.

现在我想谈谈,什么是开放课程软件,并且与你分享一些,第一次开放这个网站的工作经验。

麻省理工公开课 - 媒体、教育、市场课程节选

We just launch the site three weeks ago.

我们三周前才开放了网站。

麻省理工公开课 - 媒体、教育、市场课程节选