动词
中文翻译：润滑
同义词：
['lubricate', 'grease', 'oil up']
例句：
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1.The engine needs 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 engine is very smooth, which is due to the proper lubrication of its parts.
汽车的发动机非常平滑，这是由于其部件得到了适当的润滑。
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3.To keep the gears running smoothly, it is important to lubricate them regularly.
为了保持齿轮运行顺畅，定期润滑是非常重要的。