Electronic Messaging Services 电子传讯服务 Electronic Mail and Messaging Systems 电子邮件和消息系统 WEMA World Electronic Messaging Association 世界电子报文传送协会 ..
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这些功能主要由电子邮件系统、聊天服务以及文件传输工具来提供，以接近实时的速度传输数据、消息、音乐、图片和视频。
These are provided most notably by E-mail systems, chat services, and file-transfer facilities that offer nearly instant transfer of data, messages, music, photos, and videos.
这类用户需要基本的办公功能(如电子邮件、即时消息传递、公司门户、浏览器以及对文件和打印系统的访问)来完成日常工作。
These users require basic office functionality, such as email, instant messaging, company portals, browsers, and access to file and print systems, to do their daily jobs.
通常，此类系统包括关键服务器、网络中枢和诸如电子邮件及语音等消息部分，如图1所示。
Often, such systems consist of the critical servers, the network backbone, and messaging pieces such as E-mail and telephony, as shown in Figure 1.
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