Mineral oils are used to lubricate machinery. [VERB noun]
矿物油被用来润滑机器。
...lubricating oil. [VERB-ing]
润滑油
Use a touch of linseed oil for lubrication.
用一点亚麻籽油来润滑一下。
Franklin's task was to lubricate the discussions with the French. [VERB noun]
富兰克林的任务是促使与法国方面的会谈顺畅进行。
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