名词
中文翻译：底部存款
同义词：
['bottom money', 'bottom funds', 'bottom reserve']
例句：
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1. The company has a large bottom deposit to cover unexpected expenses.
该公司拥有大量的底金以应对意外支出。
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2. The bank's bottom deposit is sufficient to meet its daily operating needs.
银行的底金足以满足其日常运营需求。
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3. The government's bottom deposit is used to fund social welfare programs.
政府的底金被用于资助社会福利项目。