我会解释系统用户和管理员所遇到的一些基本问题，然后展示对造成这些问题的起因的调查结果。
I explain the basic problems encountered by the system's users and administrators and then show the results of specific investigations into the cause of those problems.
如果用户是系统管理员和集成商，他们就会关心如何维护云。
If the users are systems administrators and integrators, they care how things are maintained in the cloud.
用户可以从系统管理员定义的选项列表中进行选择。
The user can choose from a list of possible selections that the system administrator defines.
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