Photoluminescence of Yb~(3+)/Er~(3+) Co-doped Al_2O_3 Film Fabricated by Medium Frequency Sputter是什么意思_Photoluminescence of Yb~(3+)/Er~(3+) Co-doped Al_2O_3 Film Fabricated by Medium Frequency Sputter在线翻译_英语_读音_用法_例句