RS Monitoring on the Dynamic Change of Vegetation Coverage in a Farming-pasturing Ecotone--A Case Study in Yanchi County, Ningxia Hui Autonomous Region是什么意思_RS Monitoring on the Dynamic Change of Vegetation Coverage in a Farming-pasturing Ecotone--A Case Study in Yanchi County, Ningxia Hui Autonomous Region在线翻译_英语_读音_用法_例句