I teach chemistry also but had not thought about the possibility that they were refering to the protons that will react with nucleophile compound, thus “stealing” electrons.
I was thinking about the base that is left, and is perfectly contempt with the electron density around the acid site (and could to some extent also be a Lewis base).
But Lewis acids have nothing to do with lemons yet I see your point !
I’ve read the first book and only watched the first two episodes. First thing : the Book takes place in China, which is more logical.
From what I’ve seen from the first two episodes, they created a lot of new things (the number of protagonists, the fact that a girl seemingly come from nowhere and doesn’t appear on cameras, the fact that the satellites didn’t see the blinking stars whereas it was precisely the satellites that saw them in the book, …)
I think the show took the book, did a fanfic rewriting of it and published it. Were they right ? Maybe, because the boo wouldn’t translate really well as is, in a TV show.