Eric Whitacre's Virtual Choir 2.0 singing "Sleep" is on YouTube.

VOA: special.2011.05.09

The goal of virtual office hours is if you're sitting down in mather or the quad or wherever, even off campus on some weekend, we'll still hold, not as many, but some virtual office hours.

虚拟办公时间的目标是，如果你坐在,院子里或其他地方，甚至是某个周末不在学校里,我们仍然保持联系，虽然不是很多，但是有一些虚拟办公时间。

哈佛公开课 - 计算机科学课程节选

In June,2009 under virtual house arrest. revolution, the street. Iranians went to the polls to vote on their next president.

VOA: standard.2010.06.11

Clinton says Washington is opening new business development centers and is working on a virtual entrepreneur network to link small-scale enterprises on line.

VOA: standard.2009.11.03

Entire sections of Washington have been on virtual lock-down in advance of the summit.

VOA: standard.2010.04.11