phase of development

例句：

1. 1. The development of the new technology is in a critical phase.
   新技术的发展正处于一个关键阶段。
2. 2. The project has gone through several phases before it was completed.
   这个项目在完成前经历了几个阶段。
3. 3. The company is undergoing a transformational phase.
   公司正处于一个转型期。