提供者对象包含了呼叫模型对象，地址，终端和调用，这是在任何一个应用程序的时间控制整个集合。
The Provider object contains the entire collection of call model objects, Addresses, Terminals, and Calls, which are controllable at any time by an application.
服务请求者节点常常代表商业应用程序组件执行远端的过程调用分布式对象，即服务提供者。
Service requestor nodes will often represent a business application component that performs remote procedure calls to a distributed object, the service provider.
在对象的生命周期期间，在将提供者和资源对象中的相应方法作为垃圾回收之前，可对其进行多次调用。
The corresponding methods on the provider and resource objects can be called multiple times during the life of the object before being made available for garbage collection.
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