All right, so let's think of a more complicated example of having a double bond, and maybe a more interesting example, and this is talking about benzene.

好了，让我们来看关于双键的,一个更复杂的例子，也许是更有趣的例子，我们要讨论苯环。

麻省理工公开课 - 化学原理课程节选