phase switching circuit

例句：

1. 1. The new phase-switchingcircuit has greatly improved the efficiency of ourpower system.
   新的相变开关电路大大提高了我们电力系统的效率。
2. 2. The phase-switching circuit isused to control the flow ofelectricity in a power grid.
   相变开关电路用于控制电网中电能的流动。
3. 3.The phase-switching circuit was designedto prevent power outages during peak demandperiods.
   相变开关电路被设计成在需求高峰时段防止停电。