tailback

noun

1. （车辆因受阻而排成的）长队，长蛇阵
   a long line of traffic that is moving slowly or not moving at all, because sth is blocking the road

1. 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.
   1. 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。

in AM, use 美国英语用 backup

1. 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。
2. A convoy of army lorries was proceeding along the highway head to tail. Because of the crash, there's a six mile tailback on the motorway from junction four.
   军车队正一辆接一辆地沿着马路行驶。由于发生撞车事故，从高速公路第四交叉口开始受阻车辆排起了6英里的长队。

noun

1. (American football) the position of the offensive back on a football team who lines up farthest from the line of scrimmage

2. (American football) the person who plays tailback