Organizers say another aim of the walk is to recruit members of different faiths to join forces in community service projects to clean the environment and help the poor.

VOA: standard.2009.10.19

They do community service activities together and there's different kinds of sororities.

他们会一起做社区服务活动，而这些姐妹群也有自己的分类。

不能错过的派对 - SpeakingMax英语口语达人