polystage

例句：

1. 1. The project is divided into several polyphases for easier management.
   该项目被分成几个多阶段以便于管理。
2. 2.The construction of the bridge was a multi-stage process that took several years to complete.
   桥梁的建设是一个分阶段的进程，需要几年时间才能完成。
3. 3. The company has implemented a multi-stage training program to improve employee skills.
   该公司实施了一个分阶段的培训计划来提高员工的技能。