Aeronautical passenger communications is one form of public correspondence.

航空乘客通信是公众通信的一种形式。

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There is nothing secretive about the Ombudsman's work, for his correspondence is open to public inspection.

司法特派员的工作没有什么秘密可言，他的信件是公开的，供公众监督。

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WPKI (wireless Public key infrastructure) is carried on the optimized development in the wired PKI foundation, provides the key management infrastructure for the wireless correspondence environment.

WPKI是在有线pki基础上进行优化拓展，为无线通信环境提供密钥管理的基础设施。

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Its members have used legislative initiatives, oversight hearings, public statements and official correspondence to rouse the public.

CENTERFORSECURITYPOLICY: Rep. Howard 'Buck' McKeon, Keeper of the Flame

Yet instead of being replaced by public libraries or correspondence schools in the past (as some experts had predicted) or by TED video lectures more recently, college has become more ingrained in our culture than ever.

FORBES: Through Eight Centuries of Criticism, College Remains Worth It

The lawsuit details correspondence between various public-education advocates and reporters at USA Today, Bloomberg, the Miami Herald and others.

FORBES: E-Mails Spice Up Lawsuit Over Private Colleges