1the nub of the problem/matter/argument etcMAINthe mainpoint of a problem etc 问题/事情/争论等的焦点[要点]
The real nub of the matter is money.
问题的实质是钱。
Examples from the Corpus
the nub of the problem/matter/argument etc• Even so, some braincells were still working, as I stared inwardly at the nub of the problem.• It sounds perfectly reasonable, but you will perceive that here is the nub of the matter.• This is the nub of the matter.• This, however, was the nub of the problem.
2.[countableC] a small rounded piece of something, especially a piece that is left after the rest has been eaten, used etc 〔尤指吃剩或用剩的〕小块,小片