It is well known that the fiber core refractive index control in fiber fabrication is important, especially for erbium doped fiber (EDF).是什么意思_It is well known that the fiber core refractive index control in fiber fabrication is important, especially for erbium doped fiber (EDF).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句