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A new device is helping computers provide great amounts of informatio [00:27.35]The device is the compact disc or C [00:43.02]It was invented several years ag [00:57.50]to replace music records made of plasti [01:13.67]A CD is played on a machine tha
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中国家庭并不常用电话答录机(Answering Machine),但在北美家庭,几乎家家都用。外来电话拨入时,若该电话号码的主人不在,就会让拨入者听到一段留言,这叫Answer。绝大多数的Answer都是千篇一
The Nobel Prize in physics goes to Charles Kao, of Standard Communications Labs in England and the Chinese University of Hong Kong, and George Smith and Willard Boyle of Bell Labs in New Jersey. Kao figured out how to transmit light over long distanc
THIS IS AMERICA - With Podcasts, When Students Speak in Class, the World Can ListenBy Brianna Blake Broadcast: Monday, March 20, 2006 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA in VOA Special Engli