And, this one here, some of you might recognize, is dichlorodifluoromethane. It's also known as a CFC.

而且在这些当中有些你或许认识，是二氯二氟化碳，它也是众所周知的氟利昂。

麻省理工公开课 - 固态化学导论课程节选

And the last example that we're going to talk about is thionyl chloride, so it's s o c l 2. This is another good step forward, because now we actually have four different atoms in our molecule.

我们要讨论的最后一个例子,是氯化亚砜，就是硫，氧，氯，二，这又是一个进步，因为我们的分子中现在有四个不同的原子了。

麻省理工公开课 - 化学原理课程节选

You start with O double minus, so that is oxygen plus two electrons.

你从氧二负离子，也就是氯元素带2个负电子。

麻省理工公开课 - 固态化学导论课程节选