可以将推理和建模流程看作一个操作栈。
The inference and modeling process can be thought of as an operation stack.
其概念是非常简单的：通过使用整个软件栈(操作系统、应用、配置数据等等)的虚拟映像来避免安装与配置上的冲突。
The concept is simple: avoid all installation and configuration hassles by using a virtual image of an entire software stack: operating system, application (s), configuration data, etc.
要使操作成功完成，调用栈中的每个类必须有必需的许可权。
Each class in the calling stack must have the required permissions for the operations to complete successfully.
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