mother current

例句：

1. 1.The mother current is responsible for the flow of electricity in a circuit.
   母流负责电路中电流的流动。
2. 2. In some cases, the mother current can be used to measure the strength of the magnetic field.
   在某些情况下，母流可以用来测量磁场的强度。
3. 3. The mother current is essential for maintaining the stability of electrical systems.
   母流对于维持电气系统的稳定性至关重要。