消息反映了在可能的分布式环境中，服务消费者和提供者之间的数据交换。
Messages represent data exchanged between service consumers and providers in a possibly distributed environment.
通过为分布式应用程序提供经过良好定义的接口和数据交换格式，架构的Web服务实现克服了这些挑战。
A Web Service implementation of the architecture overcomes these challenges by providing a well-defined interface and data exchange format for a distributed application.
分布式虚拟环境中，位于同一个AOI中的实体需要进行数据交换，若它们属于不同的节点机(实体管理器)，就会占用网络资源。
Data exchange between entities, which lying in the same AOI region and belonging to the different node machine (entity manager), must consume network bandwidth in Distributed Virtual Environment.
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