I don't understand what you mean. Could you get your points a little bit easier please?
He's saying that the electron dot structure you've posted is an oversimplification that is ultimately inaccurate. The nitrite ion does not consist of one N-O double bond and one N-O single bond. I'm guessing you haven't gotten to this point in chemistry class yet, but electrons in a double bond can sometimes spread over more than one bond. That is what is happening here. The electrons from the N-O double bond in the electron dot structure are actually spread equally over both of the N-O bonds.
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