Chemical component characteristics of sandstone and recognition to provenance tectonic setting of the Yingou Formation of Lower Ordovician at Cuijiadun section, Jingtai County of Gansu Province是什麼意思_Chemical component characteristics of sandstone and recognition to provenance tectonic setting of the Yingou Formation of Lower Ordovician at Cuijiadun section, Jingtai County of Gansu Province在線翻譯_英語_讀音_用法_例句