单词：magnetic-core with rectangular hysteresis loop
单词：magnetic-core with rectangular hysteresis loop 相关文章
CHORUS Here we go looply-loo! Here we go looply-loo! Here we go looply-loo! All on a Saturday night! You put your right hand in, you put your right hand out. You give your hand a shake, shake, shake.
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This is Scientific American's 60-Second Science, I am Cynthia Graber.This'll just take a minute. On earth, snow crystals as we all know, form from frozen water. But scientists believe there're also flakes that fall on Mercury, and they're made of iro
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to throw a curve to throw for a loop 美国人在打棒球时经常喜欢发曲线球，使球的方向会发生突变，这样给对方造成错觉，不能回击那个球。这和其他球类运动，
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Scientists Work to Understand Earth's Magnetic Field 科学家们努力了解地球磁场 Most of us rarely think about the earth's magnetic field. We might know that it helps guide birds as they travel and keeps our compasses pointing north. But, th
2015年VOA慢速英语(八)月
As the vast sphere reaches / maximum speed, something incredible happens. Huge lines of magnetism arc in and out of the model core. Well, we can't see the magnetic field coming out of the experiment, we can measure them, we can put many different mag
自然百科2011年
Larry Newitt from the Geological Survey of Canada charts the movement of the magnetic North Pole as it wanders the icy reaches of northern Canada. To determine where the magnetic pole / is, we can't rely on one single observation. What I try to do is
自然百科2011年