In contrast, if we talk about a double bond, what we're now talking about is having both a sigma bond and also one pi bond. And I apologize, I intended to set this up right before class, but that didn't happen today.
相反,如果我们讨论一个双键,我们现在讨论的是,一个sigma键和π键,抱歉,我应该在课前就把这个装好的,今天没装好。
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