But why is that? A study published in two thousand three in the journal Science offered an answer.

VOA: special.2009.06.24

Three. Good, so everyone that recognized that probably got the right answer of three angular nodes here.

三，很好，那么知道这一点的同学,应该都得到了正确结果,也就是三个角向节点。

麻省理工公开课 - 化学原理课程节选

Three. Good, so everyone that recognized that probably got the right answer of three angular nodes here.

三，很好，那么知道这一点的同学,应该都得到了正确结果,也就是三个角向节点。

麻省理工公开课 - 化学原理课程节选