与美国小学生一起学英文第9册 第1期:地核

Core 地核 Do you know what is inside the Earth? 你知道地球内部有什么吗? There is a mantle and a core. 它里面有地幔和地核。 The mantle covers the core. 地幔包裹着地核。 Then, what is the core? 那么，什么是地核呢

科学美国人60秒 SSS 影响地球的不止是太阳和月亮

Jupiter and Venus Squeeze Earth's Orbit The Sun exerts an enormous and obvious influence on the Earth, with its gravity and light. But other bodies also have a small say in our affairs. 太阳用其重力和光线对地球产生巨大而明显的影响

英语新闻与报道—News & Reports 101

Wk 15 (12 April 1961) Russia Sends First Man Into SpaceThis Week in HistoryRussian cosmonaut Major Yuri Alexeyevich Gagarin becomes the first man to fly into space. In 1961, Russia beat the U.S.A. in the race to get the first man into space, winning

【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,

双语趣听精彩世界 第98期:全球变暖谁的错?

英国每日邮报:我们经常说由于人类因为缺少环保意识才导致了地球变暖,但是,事实真的是这样吗?目前这还是个具有争议的话题. 全球变暖谁的错? Daily Mail: Was the Earth in a period of global warming or

我国空间站方案已确定 2024年或成太空中唯一

China may be the only country to have a space station in service by 2024 when the International Space Station retires, said Lei Fanpei, chairman of China Aerospace Science and Technology Corp. 中国航天科技集团董事长雷凡培日前表示，到

SSS 2011-09-08

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

与美国小学生一起学英文第7册 第12期:地幔

Mantle 地幔 We are living on the surface of the Earth. 我们生活在地球表面。 So, what is inside the Earth? 那么，地球内部是什么？ There is a mantle under the surface of the Earth. 地球表面以下是地幔。 The mantle takes

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

VOA标准英语2011--Tajikistan Plans to Build World's Tallest Hyrdo Dam

Tajikistan Plans to Build World's Tallest Hyrdo Dam With high mountains covering half of the nation, landlocked Tajikistan would like to become the Switzerland of Central Asia, exporting hydroelectricity to its neighbors. But first it has to generate

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

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

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

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

英语听力：自然百科 金星和水星旅行指南 Venus and Mercury-5

Mercury's core makes up about 60% of the planet by mass. It's about twice as big as earth. Why would it have such a huge core for such a small planet? Some people think there was a huge impact. Kind of stripped off a lot of the planet and now what we

环球英语 — 115：Sign One: Disappearing Glacial Ice

Voice 1 Thank you for joining us for todays Spotlight program. Im Joshua Leo. Voice 2 And Im Rebekah Schipper. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voi

英文短篇故事（纽约）384 Where Did the Oceans Go?

A huge meteorite crashed into the Atlantic Ocean. Babies who were sound asleep in Asia heard the impact. The meteorite went through the ocean bottom. It created a hole deep in the Earth. All the seawater from the Atlantic started rushing into the hol

万物简史 第311期:地下的烈火(19)

The outer core is in many ways even less well understood, though everyone is in agreement that it is fluid and that it is the seat of magnetism. 外核在许多方面被了解得更少，虽然大家都认为它是液态的，是产生磁力的地方。

万物简史 第310期:地下的烈火(18)

So all that can be said is that at some slightly indeterminate point as we head toward the center of Earth we leave the asthenosphere and plunge into pure mantle. 因此，我们只能说，在前往地球中心的过程中，我们会在某个不大确

【英语时差8，16】地洞

Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye