flying squad

group of police officers who are always ready to move quickly, eg when a crime has occurred 机动警察队.

fly-by, fly-by-night, fly-fish, fly-fishing, fly-half, fly-paper, fly-past, fly-spray, flycatcher, flyer, flying, flying buttress, flying colours, flying column, flying doctor, flying fish, flying fox, flying jump (also flying leap), flying officer, flying picket, flying start, flying tackle, flying visit, flyleaf, flyover, flysheet, flyweight, flywheel, FM, FO, foal, foam, foamy, fob, focal, focal length (also focal distance), focal point, focsle, focus, focus on,