High alumina codoping EDFA have wider and flatter gain spectra, which can be used in long haul wavelength division multiplexing (WDM) system.是什么意思_High alumina codoping EDFA have wider and flatter gain spectra, which can be used in long haul wavelength division multiplexing (WDM) system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句