跟踪主题包括电厂、公共电力、实用销售，销售支持和工业销售。
Track topics include power plants, public power, utility sales, sales support and industrial sales.
除了队列和主题之外，客户还跟踪集群中管道和队列的状态。
In addition to queues and topics, the cluster also tracks the state of the channels and queue managers in the cluster.
PostRank的discovery engine跟踪这些feed的受欢迎情况，然后在主题列表中进行分级排列。
The PostRank discovery engine keeps track of how popular feeds are getting, and will take that in to account for their placement in the topic lists as well.
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