名词
中文翻译：闲置速度
同义词：
['idleness', 'idling speed']
例句：
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1.The car's idle speed is too high, which can waste a lot of gas.
这辆车的闲置速度太高了，会浪费很多油。
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2. The idle speed of the engine is important for maintaining its efficiency.
发动机的闲置速度对于保持其效率很重要。
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3.The idle speed of the engine should be kept at a low level to reduce emissions.
发动机的闲置速度应该保持在一个低的水平，以减少排放。