(informal)very quickly or soon
(非正式)很快，马上，立即
at a continually decreasing rate
越来越少
used to introduce something as being even less likely or suitable than something else already mentioned
［表示比刚刚说过的事更不可能或更不适合］更不要说
what woman would consider a date with him, much less a marriage?.
什么样的女人愿意跟他约会，更不要说嫁给他了？。
used to suggest, often ironically, that something is surprising or impressive
［用于表示某事令人惊讶或给人留下深刻印象，常为讽刺］竟，居然
Peter cooked dinner—fillet steak and champagne, no less.
彼得居然做出了饭——里脊扒和香槟酒。
Not at all
根本不
He had a less than favorable view of the matter.
他对那种事情根本不抱好感
Certainly not
更何况
I'm not blaming anyone, much less you.
我根本就没有责怪任何人，更不用说你了