在消息队列（Notification Queue）里设定了多个启动activesync的基于事件(Event-based)的命令，假如你用软件（我用MemMaid）查看你PDA上的事件列表，会看到在Event...
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All checks are done using the State and notification Broker and Named Events in the notification queue.
所有的检查都是利用国家和通知代理，并命名活动的通知队列。
Amazon has another notification service, Simple Queue service (SQS), using a polling-based approach to messaging.
亚马逊还有另一项通知服务，称为简单队列服务，简称SQS，采用轮询的方式处理消息。
The client code would either poll the output queue for the response or wait for some kind of call-back notification when the response message has been delivered.
客户机代码将轮询输出队列以获得响应，或等待响应消息交付时的回调通知。
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