conservationaladj.保存的;守恒的;;油封的
conservationn.保存;保护;守恒;节约
Conservation tillage under ridge plowing垄作保护性耕作
conservation districts of historic sites历史文化保护区
conservation-oriented residential area节约型住区
conservation and sustainable development保护与可持续发展
conservation cultural relics and heritage文物保护
conservation-oriented construction site节约型工地
Conservation and Preservation Technologies保持与技术保存
conservation-oriented market environment节约型市场环境