标签：Earth Day 相关文章
SCIENCE IN THE NEWS - Study Confirms Earth-like Planet in What Scientists Call The Habitable Zone MARIO RITTER: This is SCIENCE IN THE NEWS, in VOA Special English. Im Mario Ritter. BARBARA KLEIN: And Im Barbara Klein. Today, we tell about the discov
2011年VOA慢速英语(十二)月
I feel the earth move under my feet I feel the sky tumbling down I feel my heart start to trembling Whenever you're around Oh baby When I see your face Mellow as the month of May Oh darling I cant stand it When you look at me that way I feel the eart
The Voice 美国好声音
Radiation causes damage at the most fundamental level. It mutates the blueprint of life, DNA. Earth's magnetosphere is our crucial defense. It's so fundamental to our evolution and continued existence that the race is on to understand why it's changi
自然百科2011年
Glatsmire's model shows that the magnetic poles swap places spontaneously due to / complex processes within the core. We were used to the idea that a compass points somewhere near the North Pole and hence we can use it for navigation, but there are p
自然百科2011年
By analyzing thousands of lava samples, geophysicists discover/ that the Earth's magnetic field has reversed over 18,000 times in the last 20 million years. On either side of these reversals is a long period of dramatically reduced field strength. Du
自然百科2011年
In polar regions where the magnetic field is / weakest, auroras glow in the sky. These dazzling displays of colored lights form when solar particles slam into gases in our atmosphere causing them to glow. The stronger the solar wind, the more dramati
自然百科2011年
Scientists believe that the South Atlantic Anomaly, is a sign of a global decline in the magnetic field. Evidence of this comes from a surprising source. Dr. Mimi Hill uses pottery to uncover the secrets of earth's magnetic past. Ancient pots tell us
自然百科2011年
The loss of the magnetic field has a catastrophic impact on the planet's evolution. Mars becomes the red planet we see today. If earths magnetic protection continues to fade, would it suffer the same fate? If it vanishes completely, the planet might
自然百科2011年
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粉红猪小妹第二季
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粉红猪小妹第二季
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粉红猪小妹第三季
Climate change is the great environmental challenge facing the world today. But maybe we should start calling it climates change. Because scientists whove looked to glaciers to study the history of climate on Earth have found that the Northern and S
60秒科学
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加州英语分级G1
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加州英语分级G1
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加州英语分级G1
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加州英语分级G1
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加州英语分级G1
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加州英语分级G1
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加州英语分级G1
Did you witness any of the events of Earth Hour this year? There was a lot more participation this year from around the globe, than last year. 125 countries signed up to turn out some major (majour) lights, and out of those countries, 56 national cap
英语博客 A cup of English