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

And they want to be sure that before you get married, you can do things in the house.

他们想在结婚之前确认，你能做家务。

I'm good at 课堂 - SpeakingMax英语口语达人

It decreases. If you're still not completely up on the periodic trends, that is stuff that's going to be on the first exam, so make sure that you're able to do this without taking too much time to think about it.

它会降低，如果你还没有完全掌握周期性规律，而这是第一次考试要求的内容，因此请务必做到不用,想太久就能做到这点。

麻省理工公开课 - 化学原理课程节选

I'm not sure there might be additional things that international students have to do like additional tests.

我不确定留学生录取是不是还有其他要求，比如说还要加试什么的。

被学问的自由所迷住 - SpeakingMax英语口语达人