This is their sixth studio album, but only the second to open at number one on the Billboard Albums Chart in the United States.

VOA: special.2010.04.23

It is the only region that responses to 100 spikes per second.

这是唯一以每秒钟100次做出反应的区域。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Campaign staffers for President Karzai say a second-round election is unavoidable and the only constitutional means to establisha new government.

VOA: standard.2009.10.25