| 词组 | crack down on |
| 释义 | Idiom crack down oncrack down (on someone/something) to take strong action to stop something bad from continuing.The university is taking steps to crack down on underage drinking on campus.Countries that used to ignore terrorist groups in their midst are starting to crack down. crack down on verb to seize or make off with something AUSTRALIA, 1961crack down on, toTo take strong measures against someone or something, as in “The police are cracking down on drug dealers.” This colloquialism first appeared in the 1930s and caught on quickly, especially with reference to repression by authority figures. |
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