crack down片语动词KK [kræk daʊn] /kɹæk daʊn/发音片语动词1严厉打击、取缔、严加整治常与 on 连用Police are cracking down on drunk driving this holiday season.警方在这个假期期间严厉打击酒后驾车。2加强管束、严加管理常与 on 连用The school is cracking down on students who skip class.学校开始严加管束那些逃课的学生。用这个字练口说→