tramp iron

例句：

1. 1. The train tracks are in poor condition.
   火车轨道状况不佳。
2. 2.The engineer inspected the tracks before starting the new project.
   工程师在开始新项目前检查了轨道。
3. 3. The tracks were damaged during the heavy rains.
   大雨损坏了轨道。