secondary circuit of hydropower station

例句：

1. 1. The power station has a primary and a secondary circuit for generating electricity.
   这个水电站有一套主电路和一套次级电路用于发电。
2. 2.The engineer designed the circuit to handle the high current efficiently.
   工程师设计了这套电路，以高效地处理高电流。
3. 3. The secondary circuit is responsible for providing backup power in case of a main power outage.
   次级电路负责在主要电源中断时提供备用电力。