英语词汇保证邮件是什么意思，保证邮件的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-觉斋网

单词	保证邮件
释义	DEFINITIVE EXAMPLES 权威例句〔certified mail〕Uninsured first-class mail for which proof of delivery is obtained.保证邮件：保证送到但未经保险的一级邮件美国传统
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