名词
中文翻译：地板下引擎
同义词：
['underfloor motor', 'underfloor generator']
例句：
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1.The underfloor engine powers the elevators in this building.
这个建筑的电梯由地板下引擎驱动。
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2. The underfloor engine is designed to run quietly and efficiently.
地板下引擎设计得能安静且高效地运行。
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3. The underfloor engine was a major innovation in the industry at the time.
地板下引擎是当时工业的一大创新。