单词:fill mechanism
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VOICE ONE: This is Bob Doughty. VOICE TWO: And this is Steve Ember with EXPLORATIONS in VOA Special English. Today we tell about Hoover Dam. (MUSIC) VOICE ONE: Our report today about Hoover Dam must begin with the Colorado River. This river made the
The new gasoline/electric hybrid Chevrolet Volt Today President Obama visits a U.S. auto plant that makes the battery-powered Chevrolet Volt. Some analysts think the Volt could revitalize the struggling American auto industry with its high-tech batte
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VOICE ONE: This is Bob Doughty. VOICE TWO: And this is Steve Ember with EXPLORATIONS in VOA Special English. Today we tell about Hoover Dam. It was the largest and most difficult structure of its kind ever built when work started in nineteen thirty-
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EXPLORATIONS - Hoover Dam By Paul Thompson Broadcast: Wednesday, July 28, 2004 (MUSIC) VOICE ONE: This is Bob Doughty. VOICE TWO: Hoover Dam. And this is Steve Ember with EXPLORATIONS in VOA Special E