Police are cracking down on drug dealers.

警方正在严厉打击毒品贩子。

《牛津词典》

The Fair Trade Commission has of late been flexing its muscles, cracking down on cases of corruption.

公平交易委员会最近一展雄威，对腐败案件进行了严惩。

《柯林斯英汉双解大词典》

But regulators are cracking down.

但监管层已开始打击该种行为。

youdao

Economist Gianluca Benigno of the London School of Economics says cracking down on tax havens should not be an immediate concern.

VOA: standard.2009.04.02

So in the years just before 1637, the English court under James I and then later under Charles I -the English crown had been cracking down on the delivery of Puritan sermons in the church.

因此在1637年之前，詹姆斯一世以及,后来的查理一世，领导下的王庭,此时英国的王权已经在极力打击,清教徒训诫仪式的实行。

耶鲁公开课 - 弥尔顿课程节选

Meanwhile,the Iranian regime has been cracking down on anti-government protests that erupted after June's disputed presidential election and flared anew last month.

VOA: standard.2010.01.04

Cracking down on conflict minerals may not bring peace in eastern Congo, but it could help.

FORBES: Does Your Cell Phone Contain "Conflict Minerals"?

She has notched up one success: cracking down on Maoist insurgents in their rural base.

ECONOMIST: Banyan

President Obama wants to raise more by cracking down on some egregious overseas tax gimmicks.

FORBES: Would Trimming The U.S. Corporate Tax Rate Matter?