名词
中文翻译：备用现金
同义词：
['backup cash', 'contingency funds']
例句：
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1. We need to have some backup cash in case of emergencies.
我们需要一些备用现金以防紧急情况。
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2. The company has set aside a certain amount of money for the rainy season.
公司已经为雨季预留了一定数量的资金。
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3. He always carries extra cash in his wallet just in case he needs it.
他总是在他的钱包里携带额外的现金，以防他需要它。