The Concept and Pattern Mode of Network System of Protective Forestry for Hilly and Gully Region on the Northwest Loess Plateau是什么意思_The Concept and Pattern Mode of Network System of Protective Forestry for Hilly and Gully Region on the Northwest Loess Plateau在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句