Then if I change to the triple point, where the number of phases is three, then the number of degrees of freedom 2 is one minus three is minus two, two plus two is zero.

如果考虑三相点，这里有三个相，那么自由度的数目，为1减去3得负，再加上2等于零。

youdao

So, let's change our graph where we now have this zero point set as the two individuals hydrogen atoms, and then we see that our h 2 molecule is at the negative of the dissociation energy, or the negative what that bond strength is.

那么让我们把曲线图中的零点能改到,两个分离的氢原子处，那我们就会看到,氢分子就是负的离解能，或者负的键的强度。

麻省理工公开课 - 化学原理课程节选