They don't hesitate to open fire when confronted by police.

他们一旦遭遇警察就毫不犹豫地开火。

《柯林斯英汉双解大词典》

"Police! Open up!"—"Oh well," I thought, "here we go."

“警察!开门！”—“噢，天哪，”我想，“又来了。”

《柯林斯英汉双解大词典》

He decided to open his own detective office after he left the police station.

他离开警察局后，决定开一家他自己的侦探所。

youdao

Across the street, the parking lot of Haiti's elite police emergency response unit has become an open-air medical clinic.

VOA: standard.2010.01.26

"SB 1070 will blow the door open to increased racial profiling wrongful arrests and other discrimination against anyone who police reasonably suspect may be undocumented."

VOA: standard.2010.05.08

Tens of millions of dollars have been poured into projects to help the people, like a $50 million Afghan police compound that will open later this summer.

VOA: standard.2010.05.26

Why did the Oakland police open fire on the Occupy protest with tear gas and rubber bullets?

FORBES: Were the Police at the Occupy Oakland Protest Following Conventional Police Procedures?

It's then that the police open fire with a reported 46 shots in a five-second hail of bullets.

CNN: Video captures Michigan man's shooting by police

When students covered their eyes with their clothing, police forced open their mouths and pepper-sprayed down their throats.

FORBES: #OccupyDavis Pepper Spray Incidents: Two Officers And Chief Police On Leave