what it means

问题描述:

what it means
You have been asked to give a presentation to a group of students explaining the composition (make up),management and usage of the Retail Price Index and its variations.
Using a maximum of 20 bullet points and a maximum of 20 words on each,outline your presentation.
composition,management,usage,varations.what is the exactly meaning in chinese,i cant understand.

你被要求给一群学生做一个演讲解释组织、管理和零售价格索引及变化的运用.每次用最多20个项目符号和最少20个字,勾画出你的演讲.
composition组织,management管理,usage运用,variations变化、变更