名词
中文翻译：主要效用
同义词：
['primary utility', 'essential utility']
例句：
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1. The new car has a cardinal utility in fuel efficiency.
这款新车在燃油效率上有显著的优势。
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2. The government's primary utility is to provide basic services.
政府的主要职能是提供基本服务。
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3. The company's cardinal utility lies in its innovative products.
该公司的核心优势在于其创新的产品。