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1642年,法国布里亚尔(Briare)运河竣工,开启现代运河时代;1820年,世界上最早的独轨铁路在英国建成,从此,水陆大开放缩短了人与人之间的距离。1882年,伦敦爱迪生公司开始发电,其电力可供1000个爱迪生灯泡,同年美国第一座发电厂也开始发电,电力开发为整个世界带来了光明;1970年,每公里损耗为20db/km的光纤研制成功,引起整个通信界震动,各发达国家开始投入巨大力量对光纤通信进行研发,自此,人们的联系跨越
In 1642, the Briare Canal was completed in France, opening the era of modern canals. The world’s first single-track railroad was completed in 1820 in the United Kingdom. Since then, the opening of the land and sea has shortened the distance between people. In 1882, the Edison Company of London started to generate electricity, which could supply 1000 Edison bulbs. In the same year, the first power plant in the United States started to generate electricity. Electricity development brought light to the entire world. In 1970, the loss per kilometer was 20db / km The successful development of optical fiber, causing the entire communications industry to shake, the developed countries began to devote great efforts to research and development of optical fiber communications, since then, the people across