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crack down
phrasal verb [I]
present tense
I/you/we/theycrack down
he/she/itcracks down
present participlecracking down
past tensecracked down
past participlecracked down
  1. to start dealing with someone or something much more strictly 制裁;镇压;打击
    crack down on :

    The school is cracking down on smoking. 学校正在严惩抽烟行为。

     Synonyms and related words
See also main entry: crack
crack downADVERBhard嚴厲打擊PREPOSITIONon對⋯採取嚴厲措施to crack down hard on crime嚴厲打擊犯罪

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