rail ends unevenness in line or surface

例句：

1. 1. The train is on the main railway line.
   火车正在主铁路线上。
2. 2. He had to walk along the railroad tracks.
   他不得不沿着铁轨走。
3. 3. The engineer inspected the railway tracks for damage.
   工程师检查了铁轨是否有损坏。