railroadtie

例句：

1. 1.The train was traveling along the railroad tie.
   火车沿着铁轨行驶。
2. 2. The engineer inspected the track to ensure it was in good condition.
   工程师检查了轨道，确保其状况良好。
3. 3.The construction crew had to clear away the railroad tie to make way for the new bridge.
   施工队不得不清理铁路轨道，以便为新桥梁让路。