英语听力文摘 English Digest 463、最大的磁体
时间：2019-01-26 作者：英语课 分类：英语听力文摘 English Digest
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The Biggest Magnet 最大的磁体
A: What’s the biggest magnet ever?
B: Well, that's a great question. Well, for starters you’d have to mention whoppers like the hybrid magnet at the National High Magnetic Field Lab in Tallahassee, Florida. This magnet weighs thirty-four tons and stands twenty-two feet tall.
Giant magnets in hospitals, physics labs, and other facilities help in cutting edge research. However, even a magnet the size of a building can’t compete with a magnet the size of a planet.
A: A magnet the size of a planet?
B: The Earth itself is a magnet! Researchers think it’s the effect of convection currents in our planet’s molten interior that causes the entire Earth to behave as one gigantic magnet, with a North and South Pole.
Whenever you look at a compass, what you’re doing is reading the magnetic field of the planet on which you are standing 1.
A: So that must be the biggest magnet than anywhere.
B: Yet, even a magnet the size of a planet can’t compete with a magnet the size of a star.
A: A star?
B: what about the sun? The sun is a magnet. In this case, the magnetic field is probably generated by swirling 2 plasma 3. Magnetic storms on the sun are powerful enough to have an effect on satellites and communication systems all the way here on Earth.
A: So is that?
B: Not even close. There are things in space that put all of these magnets to shame.
A: Super magnet in space? What are they?
B: Next time.
- After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
- They're standing out against any change in the law.他们坚决反对对法律做任何修改。
- Snowflakes were swirling in the air. 天空飘洒着雪花。 来自《现代汉英综合大词典》
- She smiled, swirling the wine in her glass. 她微笑着，旋动着杯子里的葡萄酒。 来自辞典例句