就像物理测试实验室内普通的计算机，虚拟机可以供个人在工作时使用，并在下班时分配用于夜间的回归测试。
Just like ordinary computers in a physical test lab, virtual machines might be used by individuals during work hours and assigned to nightly regression tests during off hours.
自变量中的某些分类变量都采用了虚拟变量的形式，以使回归结果有明确的解释意义。
Some dependent variables, belonging to category ones, served as dummy variables to make the regression result with a positively explanative sense.
有人选择了书籍，有人选择了回归自然，也有人选择了虚拟的网络。
Some people chose the books, some people chose to return to nature, some people choose a virtual network.
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