1·"Duplex" as well asshavingsthe general meaning of "two-fold" applies in the jargon of electrical telegraphy to "systems in which messages are sent simultaneously in opposite directions"(OED).
因此，在转动的地球上发生两人路线交汇的这一静止点，除了这一“复式”(duplex)故事的叙述者外不会再有其他人注意。 “duplex”一词通常的意思是“双重的”，在电信术语里，它表示“信息从两头同时向对方传递的系统”(见《牛津英语词典》)。
2·He obtained patents in such fields as telegraphy.
他在电信技术领域获得多项专利。
3·For example, the Call Center System of Mobile Company's 1860, Telegraphy Company's 1000 and 10000 are very familiar brands for consumers.
例如移动的1860、电信的1000号和10000号客服系统等已成为消费者非常熟悉的品牌。