You do not get this line from molecular hydrogen.

从氢分子中我们得不到这种光线。

麻省理工公开课 - 固态化学导论课程节选

Something I'll also point out as you see these dashed line that tell you where the individual molecular orbitals are arising from, as you get to higher and higher atomic numbers of molecules that you're making, it makes a lot more sense to look at a diagram when you draw these dotted lines in, because they can start to get a little bit confusing.

我要指出的是，你们看这些虚线,它们告诉你,每个分子轨道的起源是什么，当你的原子数,越来越高的时候，画出这些点线,使图更容易理解，因为现在开始变得有一点混乱了。

麻省理工公开课 - 化学原理课程节选

Now if you read in the book, you read about where this figure is shown in the book, you can understand more about why these structures line up in the right way so that the right molecular elements are together to form hydrogen bonding pairs between them.

如果你预习过课本,课本中有关于这些详细的描述,你可以更深刻的理解,为什么这些结构是采用这种连接方式,以使对应的分子部分靠近,并形成氢键连接

耶鲁公开课 - 生物医学工程探索课程节选