primary circuit of hydropower station

例句：

1. 1. The power station's primary circuit is responsible for generatingelectricity.
   这个水电站的主电路负责发电。
2. 2.The engineer carefully inspected the primary circuitof the generator.
   工程师仔细检查了发电机的初级电路。
3. 3. The primary circuit of thetransmission line was damaged during the storm.
   输电线的初级电路在暴风雨中受损。