It establishes Beijing ecologic and clean-type small watersheds monitoring index system by taking an ecologic and clean-type small watershed as an object of study.是什么意思_It establishes Beijing ecologic and clean-type small watersheds monitoring index system by taking an ecologic and clean-type small watershed as an object of study.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句