每个服务均提供独特的功能部分，并且具有可通过控制该服务或为其分配的策略访问的相关服务质量。
Each service provides a distinct portion of functionality and has an associated quality of service associated with it that is accessible through the policy that governs or is assigned to it.
每个服务均提供独特的功能部分，并且具有可通过控制该服务或为其分配的策略访问的相关服务质量。
Each service provides a distinct portion of functionality and has an associated quality of service associated with it that is accessible through the policy that governs or is assigned to it.
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