Ps22Pdf 关键词 : 抗抵赖 ; 邮件协议 ; 可信第三方 [gap=583]Key words: Non- repudiation; E- mail Protocol; Trusted Third Party
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certified E-mail protocol 挂号电子邮件协议 ; 可证实的电子邮件协议
e-mail protocol 邮件协议 ; 电子邮件协议
Simple e Mail Transfer Protocol 简单邮件传输协议
e- mail protocol
电子邮件协议
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"Even with the new normal of being informal, the proper way to start an e-mail is with 'Dear, '" said Cynthia Lett, director of the Lett Group, a protocol training company in Silver Spring, Maryland.
CNN: Is 'Dear' dead?
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