单词：surface-damage field
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Hoverboards Ignore Gravity Can you imagine riding around the streets of your hometown on a skateboard without wheels? In the late 1980s, film director Robert Zemeckis showed a skateboard floating above the ground in his movie Back To The Future Part
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Tornados are one of the most frightening weather phenomena on our planet. Not only are they unique in how they form, but also in how they are measured . A tornados intensity is defined by the Enhanced Fujita Scale. On this scale, the intensity of the
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SCOTT SIMON, HOST: This summer in Arkansas, a weed-killing chemical called dicamba drifted across the landscape and damaged millions of acres of crops. And the injury went deeper. It split rural communities. It destroyed friends and took a toll on th
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If we could flip a switch and just turn off the Earth's magnetic field, it will take about 15,000 years to disappear, based on the rate of decay of the field that we've seen over the last 150 years. It's currently decaying at a rate that would see an
自然百科2011年
Fire and brimstone! Ned put in. 尼德兰喊一声：好家伙！ All right then, my fine harpooner, if vertebrates several hundred meters long and proportionate in bulk live at such depths, their surface areas make up millions of square centimeters,
《海底两万里》中英双语有声读物
She heard Timmy cry, Ouch! She ran into the boys' bedroom. They were hitting each other in the head with pillows. She yelled, Stop it! What's the matter with you? Someone's going to get hurt! Billy said, Aw, Mom, we're just having fun. You can't hurt
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