单词：field coil with iron core
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[00:05.20]Nikola Tesla developed the alternating current power system that provides electricity in the United States. [00:14.42]Many of his other discoveries led to electronic inventions for which other scientists were honored. [00:22.75]Mister Tesla
美国英语听力80篇
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
Scientific American(六)月
This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Thars gold in them thar hillsand we may have meteorites to thank. Because it appears that a rain of meteors nearly 4 billion years ago peppered the Earths
Scientific American(九)月
My thoughs can be so vicious Committed to a plan The fear becomes ambitious Taking me till I am gone I don't know how it starded Beating up myself I've come to realize I barely carry on each day This life is so destructive It's blowing out my mind My
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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
Farming by GPS Saves Money, Environment Mixing tradition with technology On a weedy patch of land an hour and half from Washington, D.C., farmer Brad Eustace is tilling razor-straight lines with a GPS-guided tractor. With the computer in control, he
VOA标准英语2012年(五月)
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
Once theyve caught the light of a dying star with their state of our telescopes. The detective work can begin. We collect that light and we analyze it in great detail in order to determine whats going on, whats the chemical makeup of the star, whats
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
Easily confused by this idea, there has a big thawed iron inner core, so that I think it's just the bar magnet, just permanent magnet frozen in nad, and that's where causes all the magnetic field. But it's too hot inside the Earth, that can't happen
自然百科2011年
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
Unchained Unchained Unchained Unchained There's nothing up ahead or down the road The streets won't last forever There's nothing left to loose I cannot see myself inside this dream I know nothing lasts forever Nothing lasts forever Unchained I'm like
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Burning here In my room Feeling bad The walls are moving closer Silencing, the darkness me Leads me to The ending of another day, a mourn day Tell me who you are I am spellbound You cannot have this control on me Everywhere I go I am spellbound I wil
英文摇滚歌曲
废热发电厂用英语如何表达 新加坡上市的德龙控股有限公司宣布它已经建成了该公司的首个废热发电厂，此举既能实现废物利用，降低生产成本，又能减少碳足迹，改善空气质量。 请看报道：
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watch your back because i am coming closer shivers down your spine you were not expecting me how does it feel to be faced in your territory are you afraid to see me here im not afraid (to take me time to live my life the way i want to) im not afraid
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I cannot tell you you're falling apart Open your eyes if you wanna survive I want to tell you your love is a lie But I won't tell you, I won't tell you I can't leave this, I am fine inside it I don't feel bliss and I just keep hiding I've been burnt
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I wake up to a smoking gun The evidence is in your head There's no proof of guilt or innocence I'm finished with you taking me through A line of questioning that feeds you I must confess I'm here to kill the pain To kill the pain To kill the pain To
英文摇滚歌曲
Everything is different today I like it, like it I fell very different today I like it, like it I'm not gonna be in your parade 'Cause I don't like it You think I'm a dirty little game You think I like it You made up this fantasy with me But I don't
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Sometimes I feel alone in a million crowd An outside wandering alone without Any words to say, they can't explain The desire to overcome the pain Feel the breath that's always getting away Am I dreaming it all? I will never be afraid I'll survive, in
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