名词
中文翻译：闲置的机器
同义词：
['unused machinery', 'idle equipment']
例句：
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1.These idle machines are a major source of pollution in the city.
这些闲置的机器是城市的主要污染源。
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2. The factory has been idle for months due to the pandemic.
由于疫情，这家工厂已经闲置了几个月。
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3.The idle machines were a constant source of noise and dust.
这些闲置的机器一直是噪音和灰尘的源头。