名词
中文翻译：剩余容量
同义词：
['surplus capacity', 'spare capacity', 'reserve capacity']
例句：
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1.The company has a spare capacity of 500 units to meet demand during peak seasons.
该公司有500个单位的备用产能，以应对旺季需求。
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2.The new model car has a spare capacity for up to 100 passengers.
新款汽车的备用乘客容量可达100人。
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3.The government has set aside some spare capacity in the budget for emergency response.
政府已在预算中预留了一些备用资金用于应急响应。