名词
中文翻译：维持费用
同义词：
['maintenance expenses', 'operating expenses']
例句：
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1. Thecompany is spending a lot of money onits new product development.
该公司在新产品的开发上投入了大量资金。
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2. We need to keepour expenses low to save money.
我们需要保持开支低以节省金钱。
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3. Thefamily's monthly expensesare well within their budget.
这个家庭的月度开支完全在预算之内。