服务使用者只需要一个应答队列，该队列可以是匿名的动态队列或预定义的静态队列。
The service consumer needs only a reply-to queue, which can be an anonymous dynamic queue or a predefined static queue.
动态发现服务使得不需要在特定的地址将使用者绑定到特定的提供者，但是运行时发现本身也带来了一些问题。
Dynamic discovery of services freed the consumer from being bound to a particular provider at a particular address, but the opportunity for run time discovery created its own problems.
在此情况下，服务定义在使用者开发期间可用，注册中心的使用仅限于服务端点地址和动态绑定的运行时解析。
In this case services definitions are available during consumer development time, and registry usage is limited to the run time resolution of the services endpoint addresses and dynamic binding.
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