clamp down

名词 clamp down:

1. sudden restriction on an activity
   同义词：clampdown

动词 clamp down:

1. repress or suppress (something regarded as undesirable)
   同义词：crack down

1. The Government intends to clamp down on soccer hooliganism.
   政府拟采取措施严禁在足球比赛中闹事。
2. After the explosion, police clamped down and let no more visitors inside the building.
   爆炸之后，警方严格制止任何参观者进入该建筑。