Listen again next week at this time for the final part of "Paul's Case" told in Special English on the Voice of America.

VOA: special.2009.04.04

We can plug this in further when we're talking about the visible part of the light spectrum, because we know that for n final equals 2, then that would mean we plug in 2 squared here, so what we get is 1 over 4.

当我们讨论可见光谱的时候,我们可以把这个代进去,因为我们知道n末是等于2的,这意味着我们可以。

麻省理工公开课 - 化学原理课程节选

The Tamil Tigers,long classified by the United States as a terrorist group, waged a 26-year war for an ethnic-Tamil state in the northern part of the mostly-Sinhalese country before its defeat and final surrender in May.

VOA: standard.2009.10.22