名词
中文翻译：闲置的轮子
同义词：
['idle gear', 'idle machinery']
例句：
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1.The old car's idle wheel is a constant reminder of its age.
那辆旧车的闲置轮子总是在提醒我们它的年岁。
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2. The factory had been idle for months due to the economic downturn.
由于经济衰退，这家工厂已经闲置了几个月。
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3. The idle wheel was a symbol of the town's stagnant economy.
那个闲置的轮子是这个小镇停滞不前的经济的符号。