clamp down

基本解释

Ironically, the latest clamp-down has just led to renewed international criticism.
让人哭笑不得的是，最近的制裁结果只是导致新一波国际社会的批评。
A. played clamp-down defense when it needed to both in the fourth quarter of their Game 1 victory and in the closing moments of Game 4.
虽然这个数字还是有些高，但是第1场比赛和第4场比赛的第4节，在需要防守时，湖人还是打出了高质量的防守。
Global companies are growing increasingly worried that Thailand's recent clamp-down on Internet traffic might drag down the country's economic potential and make it more difficult to expand there.
国公司越来越担心，泰国最近对互联网交流实施的打击有可能损害该国的经济潜力，使企业更加难以在泰国扩大业务。

The ex-trial lawyer's platform is one of clamp-down protectionism and soak-the-rich populism.
FORBES: Magazine Article
He is proposing a further clamp-down on asylum-seekers: per person, Switzerland gets far more refugee applications than any other sizeable European country.
ECONOMIST: Christoph Blocher, ascendant Swiss populist
All told, Sky is responsible for a vast chunk of the Premier League's income, so a regulatory clamp-down on its ability to sell on the content it has bought from the soccer league could mean it will end up paying less for domestic broadcast rights in the next bidding round, which takes place three years from now.
FORBES: Magazine Article

To clamp down on people or activities means to take strong official action to stop or control them.