free impedance

例句：

1. 1.The free impedance of the circuit is a crucial factor in determining its performance.
   电路的自由阻抗是决定其性能的关键因素。
2. 2.In electrical engineering, free impedance refers to the resistance and reactance of a circuit without any external loads or sources.
   在电气工程中，自由阻抗指的是没有外部负载或源的电路的电阻和电抗。
3. 3. The design of the circuit requires consideration of both the free impedance andthe load conditions.
   电路的设计需要考虑到自由阻抗和负载条件。