单词：earth's polar radius
单词：earth's polar radius 相关文章
Raindrops 雨滴 From a light rain to a heavy downpour, raindrops fall to Earth's surface. And if you watch over time, you'll see that some raindrops are small and some much larger. Find out why -- on today's Earth and Sky. DB: This is Earth and Sky,
(科普英语)Earth and Sky
From a planet.......let me get out of here....stay where you are.... Humanoid aliens have been good business in the 20th century. B moviemakers in particular have found a winning formula in showing se
寻访外星人
By Paul Sisco Washington 28 February 2007 watch International Polar Year Thursday, March 1st, is the official start of the International Polar Year. The international research and educational effort officially runs till March 2008. At least 50,000 s
2007年VOA标准英语（二月）
Insects And Climate Change Its well known that big animals, like polar bears, are vulnerable to climate change. The Earth warms, polar ice melts, and the bears are out of luck. The same goes for tigers, sea lions, elephants. As the globe heats up and
英语时差8，16
图片1 circle n．圆周，圆形物，派系，循环 v. 围，环绕，盘旋 例句：I need experience to get a job, but without a job I can't get experienceit' s a vicious circle． 我得有经验才能找到工作，可是没有工作我就无法
漫画搞定六级词汇（文本+音频）
Seventy-nine degrees north latitude is near the top, at the cold edge of the world. In the winter, when temperatures plunge below freezing, there is complete darkness at noon. During summer, the sun shines at midnight, there is no place to hide. Dang
国家地理2007年
She worries a lot. She worries about polar bears. They are big, white bears. They live in the north. They need snow. They need ice. They need cold weather. There is too much pollution. Pollution heats up the Earth. Heat melts the ice. The ice is the
儿童英语小故事
Section 29 Global Warming Some people say the earth is getting warmer. They blame something called greenhouse gasses. The greenhouse gasses destroy the higher atmosphere that keeps our planet from get
英语导读1000句
The Polar Bear's Dinner by Chris Rose So, Im a polar bear, right? Got that? A polar bear. Not one of those brown bears that live in forests and on mountains. One of those big white ones, you know, surely. Where do I live? On an iceberg of course, not
原版英文故事与诗歌
The Earth Climate 地球的气候 Climate describes the typical weather of some place. 气候描述的是某些地区的典型天气。 Location is one very important factor for climate, examples are oceans, mountains, rivers and so on. 地理位置是
与美国小学生一起学英文第6册
Moon 月球 Do you have any idea how big the moon is? 你知道月球有多大吗？ The moon's radius is 1737 kilometers. 月球的半径长1737千米。 This is just one fourth of our Earth. 它的半径仅仅是地球半径的四分之一。 The d
与美国小学生一起学英文第4册
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2012年VOA慢速英语(六)月
Earths Arctic Ice Disappears, Scientists Study Nearest Exoplanet Each year, more ice disappears from the Arctic Ocean. A new study blames human activity for the loss. The damage is caused, the study says, by greenhouse gases coming from vehicles, air
2016年VOA慢速英语(十一)月
By Paul Sisco Washington 20 April 2007 NASA is preparing to launch a mission to the mesosphere, a region at the top of Earth's atmosphere where mysterious night shining clouds are formed. Little is known about the mesosphere, but its unique ice clou
2007年VOA标准英语（四月）
By David McAlary Washington 18 February 2007 The U.S. space agency NASA has launched five satellites - the most ever from one rocket - to locate the source of energy in Earth's magnetic field that triggers the colorful, dancing auroras over the north
2007年VOA标准英语（二月）
By Paul Sisco Washington, D.C. 24 November 2006 watch Polar Melting report 2007 is International Polar Year. It's an international effort to spur scientific research at the most forbidding places on Earth, primarily because many in science consider
2006年VOA标准英语（十一月)
If we are looking for Martian bugs, we should search for life forms at least as tough and alien as this. Im looking at Mars in a point of view of a microbe. And as a microbe, I really need very, very tiny amount of water. I could probably live my ent
自然百科2012年
And its here in a freezer that Messenger will encounter another puzzle: can ice exist on a planet so close to the sun? It's only when the first radar observations to the surface of Mercury were obtained back in the 90s that it was discovered that Mer
自然百科2012年
BEIJING, June 21 (Xinhua) -- China will launch a new icebreaker for use during an upcoming 2013 polar expedition, a senior oceanic official said on Tuesday. Both the new icebreaker and Xuelong (Snow Dragon), an icebreaker that operated in Antarctica,
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