Like an appliance, the specific imagestack is controlled and tested together.
与设备类似，具体的映像堆栈集中控制和测试。
2
Each virtual image is specified with a software stack object.
每个虚拟映像都使用软件堆栈对象指定。
3
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.