英语听力：自然百科 冰冻星球 前往地球尽头—2

I am standing at the North Pole, the very top of the earth. Up here, it's easy to see why the Polar Regions are so cold. The sun never rises high enough in the sky to warm my back. And those rays that do strike the surface are mostly reflected back f

英语听力：自然百科 冰冻星球 前往地球尽头—1

Over one third of our planet is frozen, and yet the icy worlds of the Arctic and Antarctic are as alien to most of us as the surface of another planet. They are places of superlatives, from ice caps that hold nearly 80% of our planet's fresh water to

万花筒 2009-06-14&06-15 地球将如何毁灭？

French researchers are predicting doom for Planet Earth. They believe neighboring planets could stray out of orbit and collide with the Earth billions of years from now. The BBC's David Shukman explains their theory. A view of Earth from orbit and a

英语魔法游戏：女超人保卫地球

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 作品简介 ： 操作方法：首先点游戏下方的放大按钮，开始按X+C键开始游戏，X键攻击，方向键控制女超人的移动。 游戏说明：地球又一次受到

英语听力：自然百科 冰冻星球 前往地球尽头—5

It's time for the couple to go their separate ways. She will give birth to his cubs alone in nine months time. And he may never see her again. He returns to the frozen ocean, no doubt relieved to resume his solitary ways. And just in time, the ice be

英语听力：自然百科 冰冻星球 前往地球尽头—8

A colossal iceberg is born. This single block of ice, many hundreds of meters across would dwarf the biggest of mankind buildings. Every year, tens of thousands of icebergs are spawned by Greenland's glaciers, and their number is steadily increasing

英语听力：自然百科 冰冻星球 前往地球尽头—7

This, Jakobshavn Isbrae, is the fastest flowing glacier on our planet, moving as much as 14 meters a day. As it advances, it destroys everything in its path, even cutting its way through Greenland's great mountain ranges on its drive downwards toward

英文书摘精选 地球的引力改变过吗?

Has Earths Gravitational Pull Been Changing? 地球的引力改变过吗？ Don, why are you slouching? Dont you know its bad for you? 唐，为啥你无精打采？你不知道这对你不好？ Did you know that about 200 tons of debris strike the

英文书摘精选 智利地震如何使地球一天时间缩短

The massive earthquake that struck Chile in February 2010 might have shortened Earth's day by 1.26 microseconds, according to calculations by a NASA scientist. An EarthSky Facebook friend asked us how. And the answer is for the day to get shorter, Ea

VOA标准英语2014--Summit Pledges to Save the Oceans 全球海洋保护峰会承诺保护海洋

Summit Pledges to Save the Oceans 全球海洋保护峰会承诺保护海洋 The summit on protecting the worlds oceans ended Friday, with a call to tackle the major threats of climate change, overfishing, habitat loss and pollution. The Global Ocean

VOA双语新闻：14、地球大小的新行星被发现

地球大小的新行星被发现 Not too big, not too small. Not too hot, not too cold. A newly discovered planet looks just right for life as we know it, according to an international group of astronomers. 不太大又不太小，不太冷又不太热

英语听力：自然百科 地球力场 Earth's Force Field—16

During its magnetic cycle, the Sun undergoes periodic changes in activity. Every 11 years, it enters solar maximum. This 11 years cycle of solar activity has peaks where theres lots of solar storms. And right now where the sun is taking a little napp

英语听力：自然百科 地球力场 Earth's Force Field—12

Six years later, they come to believe these light flashes are the results of high energy, heavy cosmic rays penetrating the spacecraft and the crew members' eyes. These/ protons or electrons, just very, very high energy, ripped / part of atoms, sprin

英语听力：自然百科 地球力场 Earth's Force Field—5

If we could flip a switch and just turn off the Earth's magnetic field, it will take about 15,000 years to disappear, based on the rate of decay of the field that we've seen over the last 150 years. It's currently decaying at a rate that would see an

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 冰冻星球 前往地球尽头—18

The relative of the woodlouse is the size of dinner plate. And this so- called sea spider has legs that expand half a meter. Now it's explorer's own revealing other worlds that lie hidden beneath the ice on land. These smoking tars are the gateway to

英语作文-初中The Earth——Our Mother-地球——我们的母亲

The EarthOur Mother Pcople often say that the earth is like our mother. She gives life to all the living things on the earth and provides us with air, food, water and other essential things we need for living. Once she was beautifhl and rich, but no

英语听力：自然百科 冰冻星球 前往地球尽头—21

The greatest challenge for the team-making frozen planet was the extremely remote of their locations. Many of the shoots lasted almost the time and needed a number of clues to join forces. One location that world classic of see the Antarctic was Moun