We can know this information even if we just knew that the bond was stronger, we wouldn't need to look at a graph here, because it turns out that if you have a stronger bond, -- that also means that you have a shorter bond -- those two are correlated.

我们依然可以得到上面的信息,即使我们所知道仅仅是这个键更强，我们不需要去看这个图，因为事实上如果你有一个更强的键，这也就意味着你有一个更短的键-,这两点是互相关联的。

麻省理工公开课 - 化学原理课程节选

Even though the graph is going up and down, the object is moving from left to right.

虽然图上曲线是上下波动,但是物体是由左向右移动的

耶鲁公开课 - 基础物理课程节选

And the reason we can see that by looking at this graph is that we see that nitrogen when it's bonded is in an even lower well than we saw for hydrogen.

原因可以通过观察这幅图发现,我们看到氮在成键之后将处于更低的势阱中,对氢而言。

麻省理工公开课 - 化学原理课程节选