index of circuit

例句：

1. 1.The index of the new product is very high, indicating that it is very popular.
   新产品的指数非常高，说明非常受欢迎。
2. 2.The resistance of the wire is measured by its index of resistance.
   通过电阻率来测量电线的电阻。
3. 3. The index of the circuit indicates the efficiency of the device.
   电路的指数表示设备的工作效率。