从资源提供者的角度来看，流媒体系统的资源层次结构主要由应用层、基础设施服务层、网络处理和存储资源三个层次构成。
From the source provider, the source layers of streaming media system consist in application layer, foundation layer, network processing layer as well as source storage layer.
架构原则也可能采用执行层决策的形式，比如，选择开源资产还是某软件厂商和服务器基础设施？
Architectural principles - for example, to prefer open source assets or certain software vendors and server infrastructures - might also take the form of executive decisions.
服务层被拆分为(自上而下)业务服务、基础设施服务和框架。
The services layer was decomposed into (from top to bottom) business services, infrastructure services, and framework.
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