railway grease

例句：

1. 1. The train's engine needs to be lubricated regularly with railway grease.
   火车引擎需要定期用铁路油脂润滑。
2. 2. The engineer used railway grease to lubricate the gears on the train.
   工程师使用铁路油脂润滑火车上的齿轮。
3. 3. The railway grease was spilled on the tracks and needed to be cleaned up quickly.
   铁路油脂洒在轨道上，需要尽快清理。