The main contribution of these tools is that GUI dialogs, tree views, and tabs replace command-line switches; but the basic file structure is the same.
这些工具最大的贡献是用 GUI 对话框、树视图和选项卡代替了命令行开关参数，但其基本的文件结构还是一样的。
Explain basic switching concepts and the operation of Cisco switches.
解释基础交换的概念和思科交换机的作用。
Space vector pulse width modulation(SVPWM) and multi-step commutation method of bi-directional switches are the basic control strategies of the matrix converter.
空间矢量脉宽调制和双向开关多步换流方式是矩阵式变换器的基本控制策略。
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