In loess hilly-gully region covered by sheet sand,soil water erosion process is different from typical loess hilly-gully region because of worse natural environment and loose land surface material.是什么意思_In loess hilly-gully region covered by sheet sand,soil water erosion process is different from typical loess hilly-gully region because of worse natural environment and loose land surface material.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句