drip lubrication

例句：

1. 1. The engine needed to be lubricated after the long trip.
   长途旅行后，发动机需要润滑。
2. 2.The car's gears were so worn out that they needed to be lubricated regularly.
   汽车的齿轮磨损严重，需要定期润滑。
3. 3. The new machine has a special feature that helps it run more efficiently, requiring less lubrication.
   新机器有一种特殊的功能，有助于其更高效地运行，减少了润滑需求。