lubricate

1. V-T If you lubricate something such as a part of a machine, you put a substance such as oil on it so that it moves smoothly. 使润滑[正式]

Mineral oils are used to lubricate machinery. 矿物油被用来润滑机器。

2. lubricationN-UNCOUNT 润滑

Use a touch of linseed oil for lubrication. 用一点蓖麻油来润滑一下。