名词
中文翻译：怠速燃油效率等级
同义词：
['idle efficiency', 'idle rating']
例句：
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1.The car's idling rating is measured at 20 miles per gallon.
这辆车的怠速燃油效率等级为每加仑行驶20英里。
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2.The manufacturer's idling rating is based on the vehicle's performance during idling.
制造商的怠速燃油效率等级是基于车辆在怠速状态下的性能。
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3.The idling rating of the engine is critical for fuel efficiency.
发动机的怠速燃油效率等级对燃油效率至关重要。