为了应用程序进行相同的调用以及放置消息的客户端的独立性，可以使用远程队列定义的别名来放置消息。
For applications to make the same call, independent of which client they are putting messages to, the message can be put using the alias of the remote queue definition.
如果调用代码忽略api并处理库代码中的数据结构，那么将丧失这种独立性，因为库实现中的改变可能破坏行为失常的客户端。
If calling code ignored the API and manipulated data structures in the library code, this independence would be lost since a change in the library's implementation might break the misbehaving client.
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