three-phase four-wire system

例句：

1. 1. This three-phase four-wire system is very efficient in power distribution.
   这种三相四线系统在电力分配方面非常高效。
2. 2. The new three-phase four-wire system has greatly improved the efficiency of our factory's production line.
   新的三相四线系统极大地提高了我们工厂生产线的效率。
3. 3. In this three-phase four-wire system, each phase has its own dedicated wire for power transmission.
   在这个三相四线系统中，每个相位都有专用的电线用于传输电力。