名词
中文翻译：保证金
同义词：
['guarantee', 'security deposit', 'surety', 'bond']
例句：
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1. Thebank requires a Promontorium of $50,000 to open an account.
银行要求开设账户时存入5万美元的保证金。
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2. The company issued a new bond to raise funds for its expansion plan.
公司发行了新的债券以筹集资金用于其扩张计划。
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3.The investor deposited the cash as a Promontorium to secure their investment.
投资者将现金作为保证金以确保他们的投资安全。