ecotourn.到生态环境保存完好的自然地区的旅行ECOpref.表示“环境”；“生态”；“生态学的”ecological system in Suburbs城郊生态ecological significant value生态重要性指数ecological concept of nature生态自然观ecological niche overlapping生态位重叠ecological water conservancy生态水利ecological modem agriculture生态型现代农业ecological tourism resources生态旅游资源ecological technology theory生态技术论eco-geochemical assessment生态地球化学评价ecologic geography of animal动物生态地理学