动词
中文翻译：润滑
同义词：
['lubricate', 'grease', 'oil up', 'lubricate the joints']
例句：
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1. The engineneeds to be lubricated regularly to prevent wear and tear.
发动机需要定期润滑以防止磨损。
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2. The car's gears need to be lubricated after every use to ensure smooth operation.
汽车的齿轮在使用后需要润滑，以确保顺畅运行。
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3. The machine tool needs to be lubricated with proper oil to maintain its efficiency.
机器工具需要用适当的油润滑，以保持其效率。