单词:Buerger's precession camera
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EXPLORATIONS -February 6, 2002: Increasing Hubble’s Power By Paul Thompson VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with the VOA Special English program EXPLORATIONS. Today
On Mondays, the Business Report examines Technology. People used to say that A picture was worth a thousand words. In the digital age, that works up to several million pixels. Digital cameras are getting smaller, better, and cheaper, as we learned f
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'Cameraperson' Captures A Filmmaker's Memoir Through Snippets Of Her Subjects play pause stop mute unmute max volume 00:0000:00repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or upda
Congratulations, you've arrived on the hottest surface in the solar system. Here, the official temperature is eight hundred seventy degrees Fahrenheit. Day or night, equator or pole, the searing heat never varies more than a few degrees, and thats wh