有三种基本的云服务模型：基础架构即服务（IaaS）、平台即服务（PaaS）和软件即服务（SaaS）。

There are three basic models of cloud service: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

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通常，您可以使用这个AMI为市场中的用户开发和测试商用网络交付的应用程序或“软件即服务”应用程序。

In general you can use this AMI for development and testing of commercially available network delivered applications or Software as a Service applications for users in the marketplace.

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软件即服务企图在本地运行的软件和远程运行(即“在云中”)的软件之间的缺口上架起一道桥梁。

Software that is provided as a service attempts to bridge the gap between software that runs locally and software that runs remotely (that is, "in the cloud").

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