单词：natural glassy rock
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Scientists: Early Humans Were Not as Simple as One Would Think Scientists have discovered evidence that some of the earliest members of the human race, Homo sapiens, were surprisingly advanced. Scientists say these early humans knew how to use color
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This is the VOA Special English Economics Report. Many people think the search for cleaner energy leads only to renewable resources like sun, wind and water. But it also leads to a fossil fuel. Natural gas is considered the cleanest of the fossil fu
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(man) I know you're anxious to get your permits and get started. But there're just a few things I'd like to mention that might help you avoid trouble during your stay. First of all, make sure you carry adequate water. You'll need it if you're hiking
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EXPLORATIONS - One of the World’s Natural Wonders: the Grand Canyon By Oliver Chanler Broadcast: Wednesday, June 15, 2005 (MUSIC) VOICE ONE: This is Steve Ember. VOICE TWO: And this is Shirley Griff
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The Rock Cycles 岩石循环 Many people know what the water cycle is, but how about the rock cycle? 许多人都知道水循环，那岩石循环呢？ Did you know that rocks also have a cycle? 你知道岩石也有循环吗？ The rock cycle expla
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Skylar Grey联手天王阿姆演绎新单《C'mon Let Me Ride》 曾经的唯美女声Skylar Grey改走性感路线，联手说唱天王阿姆演唱新单《C'mon Let Me Ride》,在mv中的最大亮点便是曾经唱着rap霸气十足的阿姆在此萌
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