Stuty of the Principal Component Analysis Method to Trance Elements for Cultivated Swertia Franchehtian H.Smith. Of Qinghai Province是什麼意思_Stuty of the Principal Component Analysis Method to Trance Elements for Cultivated Swertia Franchehtian H.Smith. Of Qinghai Province在線翻譯_英語_讀音_用法_例句