在我们的示例中，只有一个服务器有资格提供关于域bear . mcslp . pri中的主机和其他数据的响应。
From our example, there is only one server qualified to give responses about hosts and other data within the domain, bear.mcslp.pri.
对象的数据域描述了模型的状态，其操作域反映模型的行为。而模型的操作是靠对象之间发送消息来响应的。
Data field of object describes model's state, operation field of object describes model's behaviors, and operations of model are responded by messages.
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