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

And at the end of class we'll announce which recitation that is, we'll also make sure to give you a little bit of a prize if you are, in fact, in that recitation.

而且在这节课的最后,我们将会宣布哪个讨论小组答题正确率最高，并给这个小组的每位同学,发个小奖品。

麻省理工公开课 - 化学原理课程节选

So make sure that you are around the right people, like who are also learning

所以要保证你与正确的人在一起，比如那些也在学英语的人，

要继续努力 - SpeakingMax英语口语达人

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

VOA: standard.2009.04.10

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