phase and voltage regulation of power system

例句：

1. 1. The project is divided into several phases for easier management.
   该项目被分成几个阶段，以便更容易管理。
2. 2. The new product will be launched in three phases.
   新产品将分三个阶段推出。
3. 3. The team worked through several phases before reaching the final stage.
   团队在达到最终阶段之前经历了几个阶段的工作。