Firstly, the Window Size can be set at X.25 L2 (level 2, or LAPB), and it can be set at X.25 L3 (level 3).是什么意思_Firstly, the Window Size can be set at X.25 L2 (level 2, or LAPB), and it can be set at X.25 L3 (level 3).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句