如果我们想要高数据一致性和高网络性能，我们就应该选择推送方式。
If we want high data coherence and high network performance, we should choose the push approach.
这是一种比快速轮询原更有效率的无限推送方式，而快速轮询正是其它多数推送技术所采用的。
That is a significantly more efficient way of doing wireless push technology than fast polls, which is what most other technologies use.
长时间轮询：也就是所谓的异步轮询，这种方式是纯服务器端推送方式和客户端拉取方式的混合。
Long Polling: Also known as Asynchronous Polling, this method is a hybrid of pure server push and client pull.
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