ITU-T, Recommendation G.983.1: Broadband optical access systems based on Passive Optical Networks (PON), October 1998.是什么意思_ITU-T, Recommendation G.983.1: Broadband optical access systems based on Passive Optical Networks (PON), October 1998.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句