地球中心带

【一起听英语】在火星上骑行

在火星上骑行是一种怎样的体验，一定比在伦敦上下班高峰期开车还费劲吧...... Neil: Hello and welcome to 6 Minute English from BBC Learning English, I'm Neil and with me today is Chris. Chris: Hello there. Neil: Now Chris,

发表于:2018-12-27 / 阅读(26) / 评论(0)

一起听英语

科学家们努力了解地球磁场

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

发表于:2019-01-12 / 阅读(54) / 评论(0)

2015年VOA慢速英语(八)月

英语听力：自然百科地球力场 Earth's Force Field—7

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

发表于:2019-01-22 / 阅读(55) / 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—8

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

发表于:2019-01-22 / 阅读(46) / 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—9

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

发表于:2019-01-22 / 阅读(57) / 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(51) / 评论(0)

自然百科2011年

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