Examples
gōng chéng工程de的dì第yī一jiē duàn阶段yǐ jīng已经wán chéng完成le了。
工程的第一阶段已经完成了。
The first phase of construction has been completed.
既然所有的任务都按时完成了，我们已经准备好开始下一阶段的开发了。
Since all tasks have been completed without delay, we are ready to start the next phase of development.
空间科学还在起步阶段。
Space science is still in its infancy.