N-COUNT 交通堵塞;车辆长龙 A tailback is a long line of traffic stretching back along a road, which moves very slowly or not at all, for example because of road works or an accident.
The flooding led to six-mile tailbacks between west London and Heathrow Airport. 洪水导致伦敦西部和希斯罗机场间形成了长达6英里的塞车长龙。