The fashionable textbook of circuit and electric machine have not pay sufficient attention to the reference direction, even is given error description.
流行的电路和电机教科书对参考方向问题缺乏足够的重视，甚至出现错误的叙述。
The fashionable textbook of circuit and electric machine have not pay sufficient attention to the reference direction, even is given error description.
“参考方向”在电路中起着十分重要的作用，是分析计算电路的一种方法和手段。
The fashionable textbook of circuit and electric machine have not pay sufficient attention to the reference direction, even is given error description.
“参考方向”在电路中起着十分重要的作用，是分析计算电路的一种方法和手段。
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