So we can do this for any final charge we have, if we have a molecule that has a charge of plus 2, then all of the formal charges should add up to plus 2 and so on.

对于任意净电荷的情况,我们都可以这样做，比如假设我们有一个带两个正电荷的分子，那么所有的形式电荷加起来应该等于正二，等等。

麻省理工公开课 - 化学原理课程节选

I think one critism that I would have now, of the changes that are happening in New York City

对于纽约正进行的变化，我想批评的一点就是

纽约的公共交通 - SpeakingMax英语口语达人

And in terms of thinking about the phase of this p orbital, the phase is going to be positive anywhere where z is positive.

对于ｐ轨道的相位，在ｚ大于零的地方都是正的。

麻省理工公开课 - 化学原理课程节选

And, what they were trying to do was imagine a new world which would be less centralized; but, for the socialists, they wanted more centralization.

他们留下的目的就是,能生活在一个没有中央集权的社会中,但是,对于社会主义者来说则正相反

耶鲁公开课 - 1871年后的法国课程节选

In fact, just because the world is round, you can already see if this is the Earth, to somebody that's the natural direction.

实际上,正由于地球是圆的,你们可以看到如果这是地球,对于某些人来说这才是惯常的方向

耶鲁公开课 - 基础物理课程节选

We don't expect everybody to be a course six major, contrary to popular opinion, so for those are you not in that category, the second thing we want to do is we want to help students who don't plan to major in course six to feel justifiably confident in their ability to write and read small pieces of code.

和大众意见正相反，我们不希望所有人都变成course，six的主修学生，所以对于那些不在第一梯队里的人来说，我们想做的第二件事情就是,希望帮助还不想,主修这门课的人,都能获得在自己能力范围内,读写小编码的自信。

麻省理工公开课 - 计算机科学及编程导论课程节选