一项纯公益性环境保护项目的翻译：A pure public good environmental protection project 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

A pure public good environmental protection projects

A pure public good environmental protection project

An item of pure public welfare environmental protection project

A pure public good and environmental protection projects

A pure public good environmental protection project