preparatory phase

例句：

1. 1. The preparations for the conference were well-organized.
   会议的准备组织得很好。
2. 2. The preparatory phase of the project is crucial.
   项目的准备阶段至关重要。
3. 3. The teacher prepared a lesson plan for the upcoming test.
   老师为即将到来的考试准备了教案。