Demonstrators turned on police, overturning vehicles and setting fire to them.
示威者们突然袭击了警察，掀翻车辆并将其放火焚烧。
《柯林斯英汉双解大词典》
2
Policevehicles were dispatched to the city's transit hubs, and officers assigned to subways overnight were held in place so they overlapped with the day tour.
纽约市内多个公共交通交汇站均有大批警车停泊，而奉命在地铁站内巡逻的警员则日夜坚守。
3
Television stations showed ambulances and policevehicles racing to the scene.