名词
中文翻译：维护成本
同义词：
['maintenance cost', 'repair cost', 'operational cost']
例句：
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1. Thecompany's upkeep costs are increasing due to inflation.
由于通货膨胀，公司的维护成本在增加。
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2. To keep the equipment in good condition, we need to pay a regular upkeep cost.
为了保持设备的良好状态，我们需要定期支付维护费用。
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3. The project requires significant upkeep costs for the next year.
这个项目需要在接下来的一年里投入大量的维护费用。