求翻译，求高手将下面一段文字翻译一下，千万别用有道或谷歌，我们老师英文很厉害~~~
推荐回答（2个）
Presence ( presents ) is a means of communication, in accordance with certain access standards, real-time access to presence information, and displayed to other users as a method. Presence technology in instant communication plays a very important role in. Rely on the Presence technology, instant communication service to" user multiple state setting" function as the basis, to provide" subscribe to other state information" and other rich value-added services, personal / corporate users of office, conference, communication and other areas to provide efficient and convenient solution.
This paper introduces the present some related technical system, in-depth analysis of two kinds of commonly used to implement the protocol, one is based on the IMS SIMPLE, SIMPLE is on the SIP protocol extensions, to support the IM; the other one is used in the Jabber XMPP. Finally, based on the SIMPLE presents the realization plan, the use of open source stack built a prototype system.
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