rail wear

例句：

1. 1. The train's wheels are showing signs of rail wear.
   火车的轮子显示出铁轨磨损的迹象。
2. 2. The engineer inspected the rail wear on the tracks after the accident.
   事故发生后，工程师检查了轨道上的铁轨磨损情况。
3. 3.Maintaining good rail wear is crucial for safe railway operations.
   保持良好的铁轨磨损对于铁路安全运营至关重要。