名词
中文翻译：解释信
同义词：
['explanation letter', 'letter of intent', 'letter of authorization']
例句：
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1.The company sent a letter of explanation to explain the delay in delivery.
公司发送了一封解释延迟交货的解释信。
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2.The professor requested a letter of explanation from the student before granting the extension.
教授要求学生在获得延期许可前提交一份解释信。
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3. The bank required a letter of explanation from the client before approving the loan.
银行要求客户提交一份解释信，以批准贷款。