本powerpoint演示文稿首先阐述了人们对水的愿景，然后列出了正常运行的水系统的标准，解释了卫生项目的评级体系，并定义了卫生。

This powerpoint presentation begins by stating the vision of Water For People, and then lists the criteria for a functioning water system, explains the rating system for sanitation projects, and defines hygiene.