But for the young who make up most of the population, learning this history has been hard to do - schools have up to now just not taught it.

VOA: standard.2010.04.19

And then we're going to try a demo to see if we can convince ourselves that the kind of calculations we make work out perfectly, and we'll do a test up here about half way through class.

然后我们将会尝试演示去看看,是否可以确信我们能够很好的,做出这个类型的计算，我们将在课程中做一个测试。

麻省理工公开课 - 化学原理课程节选

So again, we should be able to check all of our formal charges and make sure they add up to 0, which they do, and that makes sense, because we have a neutral atom in terms of thionyl chloride.

因此同样地，我们可以检验一下,我们所有的形式电荷是否正确,确保它们加起来等于零，而它们确实是这样，这是合理的，因为亚硫酰氯是一个中性原子。

麻省理工公开课 - 化学原理课程节选

As part of the "Hang it up and Keep it Up" campaign, the volunteers not only hang up the nets in the homes but also do follow-up visits to make sure they are being used correctly.

VOA: standard.2009.04.25

Do not forget the existing forces and do not make up your own forces.

不要忘记已存在的力,不要自己乱加力

耶鲁公开课 - 基础物理课程节选

Or are you going to say that that will only take us so far, and it's the conditions that are messed up, and we have to do something about the conditions to make it easier for people to make healthier choices?

还是认为上述做法见效甚微,问题关键在于混乱的饮食环境,我们应该先改善周遭环境,使得人们更容易作出更为健康的选择

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Polemarchus But Socrates challenges Polemarchus to a group, any group, cannot be a virtue in itself, and he trips Polemarchus up with a very, in many ways, familiar Socratic argument "? "Do we ever make mistakes?"

但苏格拉底仍挑战,对一个团体或任何团体忠诚本身，并不能当作是一种美德，他对付，Polemarchus，的方式,是大家非常熟悉的苏老式辩论,“我们曾犯错吗“

耶鲁公开课 - 政治哲学导论课程节选

So I did not do any counting up here, you should make sure you do counting, I apologize.

这里我没有算，你们应该保证你们算了，我这里要道歉。

麻省理工公开课 - 化学原理课程节选