rail internal stress

例句：

1. 1. The train was delayed due to the poor condition of the railway.
   由于铁路状况不佳，火车晚点了。
2. 2. The engineer carefully inspected the rails before starting the engine.
   工程师在启动引擎前仔细检查了轨道。
3. 3. The construction of the new railway will connect two major cities in the region.
   新铁路的建设将连接该地区的两个主要城市。