impedance circle

例句：

1. 1. The impedance circle shows the relationship between the resistance and reactance of a circuit.
   阻抗圆显示电路的电阻和电抗之间的关系。
2. 2. In electrical engineering, the impedance circle is used to analyze the behavior of circuits.
   在电气工程中，阻抗圆用于分析电路的行为。
3. 3. The impedance circle helps us understand the power flow in a circuit.
   阻抗圆帮助我们理解电路中的功率流动。