PF

例句：

1. 1.The company uses a PF system to store employee information.
   该公司使用个人档案系统来存储员工信息。
2. 2. She needs to update her PF regularly to keep track of her progress.
   她需要定期更新个人档案以跟踪自己的进展。
3. 3. The PF contains all the important documents related to the project, such as the proposal and budget.
   个人档案包含了与项目相关的所有重要文件，如提案和预算。