So, either of those ways of figuring this out is the first guess of what goes in the middle will work pretty well.

因此，用上述任何一种方法来初步,估计哪个原子应该在中间都是相当好的。

麻省理工公开课 - 化学原理课程节选

So in one case, we could actually put carbon in the middle, in one place, we could put sulfur in the middle, and in one case we could put nitrogen.

那么有一种情况是，我们把碳放在中间，还有一种情况是，把硫放在中间，另外一种情况是把氮放在中间。

麻省理工公开课 - 化学原理课程节选

This is the very reactive intermediate.

这是一种非常容易反应的中间体。

麻省理工公开课 - 化学原理课程节选