单词	crack down
释义	English American crack down — phrasal verb with crack uk/kræk/us/kræk/verb C2 to start dealing with bad or illegal behaviour in a more severe way: The library is cracking down on people who lose their books. Thesaurus: synonyms and related words Preventing and impeding avert avoid avoidable bar be a drag on sb/sth idiom *block sth* out blot bottleneck derail fireproof hold out on sb hold sb/sth back holding pattern impede impedimenta prevention is better than cure idiom preventive prohibit pull pull the rug from under sb's feet idiom See more results » crack down — phrasal verb with crack us/kræk/verb to take strong action to stop something:** The law limits engine idling to four minutes, but there aren’t enough police officers to crack down on the problem.
随便看	on/under oath on/under pain of death onboarding once once again once and for all once and for all once bitten, twice shy once in a blue moon once in a lifetime once in a lifetime once in a while once more once more once or twice once over once upon a time once, twice removed once, twice, etc. removed once-in-a-lifetime once-over oncogene oncological oncologist oncology