QUALITY RETROGRADATION OF ENVIRONMENT AND RECOVERY OF FOREST VEGETATION OF THE FRAIL ZONES OF FOREST ECOLOGICAL ENVIRONMENT IN THE UPPER REACHES OF YANGTSE RIVER是什么意思_QUALITY RETROGRADATION OF ENVIRONMENT AND RECOVERY OF FOREST VEGETATION OF THE FRAIL ZONES OF FOREST ECOLOGICAL ENVIRONMENT IN THE UPPER REACHES OF YANGTSE RIVER在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句