long rail string

例句：

1. 1. The train was delayed due to the long rail string ahead of the station.
   火车因车站前的长钢轨而延误。
2. 2.The engineer carefully inspected the long rail string before starting the engine.
   工程师在启动引擎前仔细检查了长钢轨。
3. 3. The construction crew had to remove the long rail string to make way for the new road.
   施工队不得不拆除长钢轨以便铺设新路。