lubrication
潤滑;油潤;注油
lu·bri·ca·tion /ˌlubrəˈkeʃən/ 名詞
潤滑,潤滑作用,滑潤法
Lu·bri·ca·tion n. The act of lubricating; the act of making slippery.
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lubrication
n 1: the condition of having been made smooth or slippery by the
application of a lubricant
2: an application of a lubricant to something