“不，”她说完话，伫立起来，从我身边走开，“对称的原理很清晰，我能向你展示一些证据。” 她又拾起笔记本，“再细看下这个表格，但这次请看一眼第三列。
again but this time let's look at the second set of three perfect forms.
叙述了电流不对称保护的功能、原理和实验情况。
Paper also describes the function, theory and experiment of the protection.
叙述了电流不对称保护的功能、原理和实验情况。
Paper also describes the function, theory and experiment of the protection.
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