短語詞組短語multicast backbone MBONE 多播骨干MBONE E Multicast Backbone 多址傳播骨干網(wǎng)mbone multicast backbone 多址傳播骨干網(wǎng);多播主干網(wǎng);多播骨干網(wǎng)multicast backbone on the Internet 因特網(wǎng)多播基干 返回 multicast backbone