rail failure

例句：

1. 1. The train was delayed due to a rail failure in the middle of the line.
   火车因线路中间的铁路故障而延误。
2. 2. The engineer had to inspect the tracks for any rail failures before starting the new project.
   工程师在开始新项目之前，必须检查轨道是否有任何铁路故障。
3. 3. The company is investigating the cause of the rail failure that caused the train derailment.
   该公司正在调查导致列车脱轨的铁路故障的原因。