It's the job of the police to enforce the law.

警察的工作就是执法。

《牛津词典》

The police are there to enforce the law.

警察在那里执行法律。

youdao

Some argue it's too expensive to enforce the law.

有人认为，执行这类法律的成本过高。

youdao

They were willing to risk their lives to enforce the law or to commit a crime.

VOA: special.2010.03.10

In resistance to the Fugitive Slave Act the state of Wisconsin enacted a Personal Liberty Law that said they were not going to enforce the Fugitive Slave Act and turn in fugitive slaves, and the justification was that it was their state's right to do so.

为了抵制逃亡奴隶法,威斯康辛州政府颁布了个人自由法,规定他们不会执行,逃亡奴隶法并交出逃奴,理由是,该怎么做是他们州的权利

耶鲁公开课 - 美国内战与重建课程节选

He said he would take command of the army himself to enforce the law.

VOA: special.2009.04.09

"To enforce the law, the institutions of justice have to be beyond reproach, " he says.

CNN: TARGET: THE ATTORNEY-GENERAL

Wiltshire Police have said they may increasingly use hand-held, mobile speed cameras to enforce the law instead.

BBC: Council ends speed camera funding

We've been down this road before with politicians promising to enforce the law in return for amnesty.

CNN: 'Now's the time' to move on immigration, Obama says