She also said the U.S.aid community must have the courage to rethink its strategies to make sure that the programs achieve lasting change in recipient nations.

VOA: standard.2010.01.06

So here, what I'd like you to do is identify the correct radial probability distribution plot for a 5 s orbital, and also make sure that it matches up with the right number of radial nodes that you would expect.

这里，你们要辨认,哪个是５ｓ轨道的正确概率分布，并且确保它和你们,预期的节点数相符合。

麻省理工公开课 - 化学原理课程节选

I'm not sure that also the United States will also make the difference.

VOA: standard.2009.04.10