Lubrication

[,luːbrɪ'keɪʃən] or [,lʊbrɪ'keʃən]

解释:

(noun.) an application of a lubricant to something.

(noun.) the condition of having been made smooth or slippery by the application of a lubricant.

以利沙整理--From WordNet

解释:

(n.) The act of lubricating; the act of making slippery.

整理:泰勒