C band and L band erbium doped fiber amplifiers(EDFAs) are made by this high concentration EDF.The fluorescence spectrum and gain characteristics of these two EDFAs are measured.是什么意思_C band and L band erbium doped fiber amplifiers(EDFAs) are made by this high concentration EDF.The fluorescence spectrum and gain characteristics of these two EDFAs are measured.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句