These resources, or cloud providers, give the tool an environment in which to instantiate your operating system and install your custom bundle content.
这些资源(或云提供者)为此工具提供一个环境，可以在其中实例化操作系统并安装定制的包内容。
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In this way, cloud systems use virtualization to provide a flexible environment that can be configured and expanded much more easily than a physical system.