This transformation is from the abstract to the concrete and leads fairly directly to the final level, which describes the actual implementation of the model into a deliverable product or service.
这一转换是从抽象到具体，并相当直接地通向最终级别，其描述了从模型到一个可交付产品或服务的实际的实施。
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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