Rather than waiting on the back and forth pings of update notifications and polled Atom URLs, feed subscribers can receive both the notification and the message from a hub.
Feed订阅者再也不用反复等待更新通知ping结果和AtomURL轮询了，他们可以从主站中枢那里收到通知和消息更新。
Waiting for connect notification message…
正在等待连接通知消息…
Waiting for connect notification message…
正在等待连接通知消息…
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