mobile electric substation

例句：

1. 1.The new mobile electric substation has been put into operation in the city.
   这个新的移动式变电站已经在该市投入使用。
2. 2. The engineers are busy installing the new mobile electric substation.
   工程师们正在忙着安装新的移动式变电站。
3. 3.The mobile electric substation is a crucial part of the power grid.
   移动式变电站是电网中至关重要的一部分。