名词
中文翻译：保证书
同义词：
['guarantee', 'warranty', 'guarantee letter例句：1. The company issued a letter of assurance to the customer.（公司向客户发出了一份保证书。）']
例句：
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1. The company issued a letter of assurance to the customer.
公司向客户发出了一份保证书。
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2. The lawyer provided a letter of assurance for the client's defense.
律师为客户的辩护提供了一份保证书。
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3. The bank issued a letter of assurance to the borrower.
银行向借款人发出了一份保证书。