名词
中文翻译：维护费用
同义词：
['maintenance cost', 'repair expense', 'operation expense']
例句：
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1. The company spends a significant amount on its annual maintenance expenses.
该公司在年度维护费用上投入了大量资金。
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2. To keep the equipment in good condition, we need to regularly maintain and replace parts.
为了保持设备良好状态，我们需要定期维护和更换零件。
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3. The project's budget includes a substantial portion for the upcoming maintenance expenses.
该项目预算中包含了相当一部分用于即将到来的维护费用。