英汉词典

1. 润滑；加润滑油于
    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.

    e.g. Mineral oils are used to lubricate machinery.
           矿物油被用来润滑机器。
    e.g. ...lubricating oil.
           润滑油