当前素材是由九二图网为您提供的“Natural ecosystems”作品，素材编号：20120502124028，尺寸为：5120×3364 像素，大小为：11.1MB，素材关键词要素为：Green trees, green grasslands, flowers, leaves, conservation of the Earth, creativity, environmental protection, trees, a tree, nature, ecology, environment, ecological environment, other categories, ecological balance, natural ecological propaganda, phot,Landscape Pictures,Landscape,Stock Images，欢迎下载收藏！