名词
中文翻译：润滑液
同义词：
['grease', 'oil', 'fluid', 'lubricant']
例句：
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1.The engine needs a lubricating oil to keep it running smoothly.
发动机需要润滑油来保持顺畅运行。
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2. The car's engine has been replaced with a new lubricating oil.
汽车的发动机已经被更换了新的润滑油。
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3. The engineer used a lubricating oil to reduce friction between the gears.
工程师使用润滑油来减少齿轮之间的摩擦。