A Littrow configuration ECL is designed, which features that the continuous tuning range is more than 3 GHz and the linewidth is less than 1 MHz.是什么意思_A Littrow configuration ECL is designed, which features that the continuous tuning range is more than 3 GHz and the linewidth is less than 1 MHz.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句