The upheavals resulting from momentous technological change are rarely expected. The telegraph disrupted the postal service.
人们很少料到重大技术革命所带来的动荡。电报葬送了邮政。收音机和电视扰乱了报纸。飞机终结了远洋客轮。发明总是充满活力；这也解释了为什么未来永远像过去那样令人振奋。