railroad track

例句：

1. 1. The train was travelingon the railroad track.
   火车正在铁轨上行驶。
2. 2. The engineer carefully checked the railroadtrack for any damage.
   工程师仔细检查了铁路轨道，看是否有损坏。
3. 3. The constructioncrew was working on the railroad track toimprove its safety.
   施工队正在铁路轨道上工作，以提高其安全性。