The Mechanism Study of a Recovering and Rebuilding of Ecological Environment Degeneration on the Ecological System in Longzhong Loess Hilly Region是什么意思_The Mechanism Study of a Recovering and Rebuilding of Ecological Environment Degeneration on the Ecological System in Longzhong Loess Hilly Region在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句