ecolgy生态学ECOpref.表示“环境”；“生态”；“生态学的”ecotourism district生态旅游区ecological footpint生态足迹Ecological rucksack生境口袋eco- civilization生态文明ecological interest生态利益ecological gradient生态梯度econometric methods计量经济分析方法ecological delivery生态输水ecological criteria生态标准ecological dominace生态学优势