名词
中文翻译：关键支出
同义词：
['maintenance expenses', 'operating expenses', 'capital expenditures']
例句：
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1. The company's main expenditure is on research and development.
该公司的主要开支是研究和开发。
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2.The government's key expenditures are on infrastructure projects.
政府的重点项目是基础设施项目。
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3.The company's key expenditures have increased significantly in the past year.
公司过去一年的主要开支大幅增加。