Effect of Vegetation on the Erosion Control and its Significance in the Soil Conservation in Typical Areas in Longchuanjiang Watershed at Upper - Stream of the Yangtze River是什麼意思_Effect of Vegetation on the Erosion Control and its Significance in the Soil Conservation in Typical Areas in Longchuanjiang Watershed at Upper - Stream of the Yangtze River在線翻譯_英語_讀音_用法_例句