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2.5 共振式的规则
初次处理共振式时，有一套描述如何绘制和解读它们的准则会很有用。以下规则应当有所帮助：
1. When first dealing with resonance forms, it’s useful to have
When first dealing with resonance forms, it’s useful to have
2. The situation with benzene is similar to that with acetate.
The situation with benzene is similar to that with acetate.
3. When two resonance forms are nonequivalent, the actual struc
When two resonance forms are nonequivalent, the actual struc