an incomplete electrical circuit in which no current flows
例句
用作形容词 (adj.)
Since open leads will have a lower capacitance than connected leads, the tester can tell which leads are soldered correctly and which leads are open. 由于开路的导线比连接线的电容要低，所以测试仪器可以检测出哪条导线连接正常，哪条导线是开路。
美
