Some service providers can also be service requestors: they aggregate capabilities from other service providers to construct composite, higher-level services.
一些服务提供者同时也是服务请求者：它们聚集其他服务提供者的功能来构造复合的更高级别的服务。
Platform as a Service (PaaS) billing and metering are determined by actual usage, as platforms differ in aggregate and instance-level usage measures.
由于平台在总量和实例层使用度量方面不同，平台即服务(PaaS)收费和计量是根据实际使用确定的。
Platform as a Service (PaaS) billing and metering are determined by actual usage, as platforms differ in aggregate and instance-level usage measures.
由于平台在总量和实例层使用度量方面不同，平台即服务(PaaS)收费和计量是根据实际使用确定的。
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