We can also think about the distance, the bond distance. So, which would you say is going to be shorter in this case?

我们还可以考虑一下距离，键的距离那么，大家认为其中哪一个键会更短一些？

麻省理工公开课 - 化学原理课程节选

As we see a little bit later, I could talk about the carbon-hydrogen bond in methane where there is a plurality of bonds. In this case, there is only the one bond but I just want to get the formulas.

因为我们后来看到一点点，我能讨论甲烷中的碳氢共价键,那有许多共价键，这种情况下，这只有一条共价键,但我想得到氟。

麻省理工公开课 - 固态化学导论课程节选

So, in fact, yes, we did confirm that these covalent bond, at least in the case of hydrogen, we have confirmed by the numbers that we are at a lower energy state when we talk about the bonded atom versus the individual atom.

因此，事实上，是的，我们证实了共价键，至少在氢这种情况下，我们通过数据证实了,成键的原子处于能量更低的状态,当其与单个的原子相对比时。

麻省理工公开课 - 化学原理课程节选

In this case we have a double bond between a and b, and in this case we have it between b and c.

在这种情况下，我们在，A，与，B，之间有一个双键，而在这种情况下，双键在，B，与，C，之间。

麻省理工公开课 - 化学原理课程节选

So in the first case of this first bond here that I've put in a square, what type of a bond is this, is the sigma or pi?

在这第一个键里,我用方框把它标出来了，这个键是什么类型的，sigma还是π？

麻省理工公开课 - 化学原理课程节选

So in this first case here, what we're seeing is a sigma bond.

在第一个例子里，我们看到的是sigma键。

麻省理工公开课 - 化学原理课程节选