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2.Behind this rush of new technology are a number of advances that make it possible to boost the capabilities of existing copper telephone wiring and upgrade cable TV networks for two-way high-speed interactive traffic.
在这场新技术热的背后是多种技术进步，能使现有的铜电话线提高能力和改进有线电视网，传送双向的高速交互信息流。收藏指正
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