crack down
phrasal verb with crack verb uk/kræk/ us/kræk/
C2 制裁；处罚；打击；镇压
to start dealing with bad or illegal behaviour in a more severe way
The library is cracking down on people who lose their books. 图书馆将严厉处罚丢书的人。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。