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  • VOA慢速英语2011--Three Innovators Who Changed the History

    EXPLORATIONS - Three Innovators Who Changed the History of Sound and Communication Technologies STEVE EMBER: Im Steve Ember. BARBARA KLEIN: And Im Barbara Klein with the VOA Special English program EXPLORATIONS. Today we tell about three inventors wh...

  • VOA标准英语--Talent Search identifies Top US Student Inno

    Some of America's brightest students came to Washington for the 2011 Intel Science Talent Search, the nation's oldest and most prestigious science competition. The awards ceremony was the culmination of an intense week during which the 40 finalists w...

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