How can any criterion of reliable knowledge be chosen, unless we already have some reliable criterion for making that choice?
除非我们已经拥用了有可信赖的选择标准，不然我们又将如何做出选择呢？
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Your choice of hardware and software may be different, but the main hardware criterion is that your processor should have hardware virtualization available—it's a must in order to use KVM.
In the subject choice, the spatial laying aside, the color utilization, the material selection, criterion management, idea creation many aspects, it need further enhance.