This event generation is tightly coupled with process and activity state transitions.

该事件的生成与流程和活动状态的转变紧密相关。

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There are several kinds of logical entity defined in tightly coupled conference system: FOCUS, Mixer, Conference Policy Server and Conference Event Notification Server.

紧耦合结构会议系统中定义了如下逻辑实体：FOCUS、媒体混合器、会议策略服务器和会议事件通知服务器。

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