Many plainclothes policemen were ordered back into uniform for temporary riot duty.许多便衣警探奉命重新穿上警服,暂时执行防暴任务。 A plainclothes police officer escorted the surprised Frenchman out of the building.一位便衣警察护送那位惊讶的法国人走出大楼。A plainclothes policeman detained the drugpusher.一名便衣警察拘留了那个毒贩。I was given a stern look by a plainclothes policeman.一名便衣警察给我使了一个严厉的眼色。