lubricating effect

例句：

1. 1. Theengine needs lubrication to run smoothly.
   发动机需要润滑才能顺畅运行。
2. 2. Lubricating grease is used to prevent frictionbetween moving parts.
   润滑脂用于防止移动部件之间的摩擦。
3. 3. The car's enginerequires regular lubrication to maintain itsperformance.
   汽车的发动机需要定期润滑以保持其性能。