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这些光缆可以用于新型电话通讯系统。These optical fibres may be used for new sorts of telephony.该组织现有大约18,000名成员,他们会收到一份内部通讯季刊。The organization now has around 18,000 members who receive a quarterly newsletter.我们试着破坏他们的通讯设备吧。Let's try ...