[网络] 磁极化强度；磁极强度

Women's Pole Vault Provides Stirring Drama at Olympics

By Parke Brewer The women's pole vault provided one of the stirring dramas of the 2004 Olympic track and field competition. Until the mid 1990s, women's pole vault was not taken very seriously, mainly

发表于:2018-12-12 / 阅读(184) / 评论(0)

VOA2004（下）--雅典奥运

SSS 2008-08-26

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute? Don't be fooled by those big bovine eyes and the mouth slowly chewing cudcows have a magnetic personality. At least thats the claim made by German researchers in the

发表于:2018-12-24 / 阅读(235) / 评论(0)

Scientific American(八)月

SSS 2011-02-24

If you splashed down in the Atlantic, you'd flounder on which way to swim. But a hatchling loggerhead turtle would know just where to paddleby reading the Earth's magnetic field. Scientists knew turtles can pinpoint latitude this way, because the fie

发表于:2018-12-24 / 阅读(189) / 评论(0)

Scientific American(二)月

第74期: kneel, lap, magnetic, nasty, zero

说一口流利的英语，从简单的单词开始。听听，读读，背背，今天你的词汇量又增加了5个。单词/词义中英例句单词听读 kneel [ ni:l ] She knelt to pray. v. 跪

发表于:2018-12-30 / 阅读(311) / 评论(0)

每日攻克5词

VOA常速英语2015--科学家研究地球磁场

科学家研究地球磁场 WASHINGTON Most of us hardly ever think about the Earth's magnetic field. We might be aware that it helps guide birds as they migrate and ensures that our compasses point north, but not realize that it is one of the crucia

发表于:2019-01-14 / 阅读(172) / 评论(0)

VOA标准英语2015年(十二月)

VOA标准英语2015--马里兰大学实验室复刻地球磁场

Scientists Take on Earths Magnetic Field 马里兰大学实验室复刻地球磁场 WASHINGTON Most of us hardly ever think about the Earth's magnetic field. We might be aware that it helps guide birds as they migrate and ensures that our compasses p

发表于:2019-01-14 / 阅读(177) / 评论(0)

VOA标准英语2015年(七月)

英语听力：自然百科地球力场 Earth's Force Field—19

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

发表于:2019-01-22 / 阅读(188) / 评论(0)

自然百科2011年

英语听力：自然百科地球力场 Earth's Force Field—6

It's clear from the fact that the Martian crust is strongly magnetized, that there must have been a magnetic field on Mars in the past, that the only way we know to magnetize rocks is for them to form in the presence of magnetic field. Why did Mars l

发表于:2019-01-22 / 阅读(190) / 评论(0)

自然百科2011年

英语听力：自然百科地球力场 Earth's Force Field—10

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

发表于:2019-01-22 / 阅读(227) / 评论(0)

自然百科2011年

Magnetic Bubbles Detected at Edge of Solar System

The latest data from the twin Voyager spacecrafts suggest the outer edge of the solar system is not smooth but filled with giant magnetic bubbles. Scientists say the turbulent bubbles are the result of the interaction between the Suns magnetic field

发表于:2019-02-06 / 阅读(229) / 评论(0)

英语新闻

Construction starts on China's first low-speed maglev line

BEIJING, Feb. 28 (Xinhua) -- Construction began on China's first low-speed maglev(磁力悬浮火车) line Monday in Beijing, a project that will make China only the second country with a low-speed maglev line after Japan. The project marked China's

发表于:2019-02-07 / 阅读(259) / 评论(0)

英语新闻

加州语文教材 G5 V5 North Pole, South Pole 02

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发表于:2019-02-09 / 阅读(274) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(298) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(347) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(324) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(302) / 评论(0)

加州语文教材California Treasures G5

加州语文教材 G5 V5 North Pole, South Pole 07

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发表于:2019-02-09 / 阅读(332) / 评论(0)

加州语文教材California Treasures G5

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发表于:2019-02-09 / 阅读(305) / 评论(0)

加州语文教材California Treasures G5

【英语时差8,16】南北两极-下

By calculating how old the rocks are where we find these ancient compasses, we can figure out how long ago the magnetized parts were locked in. That tells us which direction was magnetic north tens of thousands of years ago. Surprisingly, its not alw

发表于:2019-02-23 / 阅读(198) / 评论(0)

英语时差8，16

VOA慢速英语2019--磁极的移动速度比科学家预想的快

Magnetic North Pole Moving Faster Than Scientists Expected Earths north magnetic pole is moving, researchers say. It has moved so much, so quickly that a group of scientists hurried to change a model that helps guide shipping, airplanes and submarine

发表于:2019-03-12 / 阅读(385) / 评论(0)

2019年VOA慢速英语(二)月

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