Unit 47Usually alternating current(AC)transmission suffers lower losses than direct current(DC), and thus, AC bec... [查看全文]
Unit 46In a Cairo school basement, two dozen women analyze facial expressions on laptops, training the computers ... [查看全文]
Unit 45Life is looking up for managers at the 4,300 stores of Tesco, one of the world’s biggest supermarket ch... [查看全文]
Unit 44Just over 20 years ago, IBM introduced the PC jr. Derided as awkward and underpowered, the PC jr. never... [查看全文]
Unit 43DOTCOMS may be moribund, but inside companies, the Internet is still finding cost-saving new uses. “B2E—b... [查看全文]
Unit 42Music fans have often viewed Microsoft as something like a bad cover band, one that pumped out uninviting... [查看全文]
Unit 41As he lays out his vision for the future of open-source software, Mark Shuttleworth is enthusiastic, but ... [查看全文]
Unit 40Older people in particular are often surprised by the speed with which the Internet’s “next big thing”... [查看全文]
Unit 39The United Nations, notorious for endless deliberations, ①is trying a technological quick fix. Its Global ... [查看全文]
Unit 38SoftBank of Japan is making its biggest gamble yet: entering the American cellphone market. SoftBank’s com... [查看全文]