idiomUKhumoroussomething you say tomeanthatyourlifeis notbadand that you should notcomplainabout it:没有什么好抱怨的,日子过得还不错"How's it going then, Mike?" "Oh, not toobad. Mustn'tgrumble."“那么,一切还好吧,迈克?”“哦,挺好,没有什么好抱怨的。”SMART Vocabulary: related words and phrasesAccepting & agreeing
acceptance
accepting
accommodation
accreditation
agree tosomething
agree withsomething
approved
concur
murmur
reconcile
rise
root
rule
sanction
self-acceptance
self-acknowledged
self-admitted
settle onsomething
signer
unanimous
See more results ?(Definition ofmustn't grumblefrom theCambridge Advanced Learner's Dictionary & Thesaurus? Cambridge University Press)#https://dictionary.cambridge.org//dictionary/english/mustn-t-grumble##