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