求翻译，具体见下面

Why it is called “Cloud”? --The term cloud is used as a metaphor for the Internet, based on the cloud drawing used to depict the Internet in computer network diagrams as an abstraction of the underlying infrastructure it represents. 
云是Internet的比喻。计算机网络图中使用云图形来抽象表现底层架构。
Cloud Computing: .... Internet- ("cloud-") based development and use of computer technology ("computing"). In concept, it is a paradigm shift whereby details are abstracted from the users who no longer have need of, expertise in, or control over the technology infrastructure "in the cloud" that supports them. Cloud computing describes a new supplement, consumption and delivery model for IT services based on the Internet, and it typically involves the provision of dynamically scalable and often virtualized resources as a service over the Internet.  
维基百科：云计算是一种计算架构转型，用户不再需要在云中的技术架构层面的专家和控制。云计算描述了一种新的，基于网络的IT服务的供应、消费和传递模式。这种模式的特点是动态地组织并做为一种服务供应可扩展的，通常是虚拟化的网络资源。
Resource (all kinds of IT services over the Internet) as a service