单词：sealed light valve
单词：sealed light valve 相关文章
Earth's magnetic field has reversed thousands of times since its formation 4.5 billion years ago. And scientists now believe that the next reversal is imminent. The race is on to predicting exactly when it will occur. In 2010, the European Space Agen
自然百科2011年
As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get increasingly close to the Earth's surface. As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get
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
今天我们要学的词是reversal。 Reversal, 是逆转的意思。A reversal of policy, 意思是政策的逆转。A reversal of decision, 意思是改变主意。支持泰国前总理他信的政党在星期天的选举中成为国会第一大党，
英语每日一词
Barbara Walters did a story on gender roles in Kuwait several years before the Gulf War. She noted then that women customarily walked about 10 feet behind their husbands. She returned to Kuwait recently and observed that the men now walked several ya
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