名词
中文翻译：有用的热效率同义词
同义词：
['utility', 'efficiency', 'effectiveness']
例句：
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1. The new design has a higher useful thermal efficiency than the old one.
新设计比旧设计的有用热效率高。
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2. The company's new product is designed to improve the useful thermal efficiency of its machines.
该公司的新产品设计用于提高其机器的有用热效率。
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3. The engineer analyzed the data to determine if there was any improvement in the usefulthermal efficiency of the new system.
工程师分析了数据，以确定新系统在有用热效率方面是否有任何改进。