单词：Hubble variable Nebula
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The Hubble When most people think of space, what comes to mind are names like 1) John Glenn and Neil Armstrong. When scientists think about space, the name that comes to mind is Hubble, a space telesc
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EXPLORATIONS -May 8, 2002: Hubble's New Camera By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Last week, the
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