... international public telegraph service 国际公众电报业务 public communication service 公用通讯业务 public bus service 公共巴士服务 ...
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These are public service ads from the social nature of the decision to make public service ads can be a very good business and the public one of the channels of communication.
这些都是由公益广告的社会性所决定的，使公益广告能很好的成为企业与社会公众沟通的渠道之一。
The purpose of public service advertisements (PSAs) is to promote the useful concept for the public interest. It is an activity of advertising communication.
公益广告是为公众利益服务的、以推广有利于社会的公益观念为目的的广告传播活动。
Concerning the insecure factors of Short Message Service (SMS) in public mobile network, a SMS system for secure communication was put forward.
针对目前移动公网中短信系统存在的不安全因素，提出了一种安全短消息通信系统。
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