This is the Police Station of Shanghai.

这里是上海市公安局。

youdao

A megaphone boomed out, "This is the police."

扩音器传出了低沉而响亮的声音：“我们是警察。”

《柯林斯英汉双解大词典》

Officer: This is the police. Open the door.

警察：我是警察！请开门。

youdao

Police say one thing that makes discussion of this law difficult is that many critics have not read the law.

VOA: special.2010.07.03

"This is what democracy looks like!" The bill would not affect police or firefighters.

VOA: special.2011.02.25

This,he says,is where the police are becoming involved, and he says,by police, what is meant is the "Guardians of the Revolution,"

VOA: standard.2009.11.14

When I made a comparison to the public's reporting of who crime suspects were, this is the public reporting to the police.

NPR: Study Focuses on NYPD Racial Profiling

This is partly because the police are now seizing more cannabis on the streets.

BBC: Border Agency reveals varied methods of drug smuggling

Unidentified Man: This is the Los Angeles police department.

NPR: May Day Immigration Marches Lose Some Steam