新概念英语第三册lesson 55 From the earth: Greetings

Lesson 55:From the earth: Greetings 来自地球的问候 Listen to the tape then answer the question below. 听录音，然后回答以下问题。 Which life forms are most likely to develop on a distant planet? Recent developments in astronomy have

经济学人: 系外行星的卫星探索之旅 (3)

That would give them a better sense of just how massive it is. 这将让他们更好的感知这个物体有多么的巨大。 There maybe more to come. The two researchers think they have found a second promising target lurking in Kepler's data. 或许

发现:适宜生命存活的一类地行星

An Earth-size planet has been spotted orbiting a nearby star at a distance that would makes it not too hot and not too cold - comfortable enough for life to exist, researchers announced September 29. If confirmed, the exoplanet, named Gliese 581g, wo

SSS 2011-04-08

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. When you hear about asteroids close to the Earth, you probably have visions of collisions and extinctions and a post apocalyptic future or of brave space c

第31230号小行星永久命名为"屠呦呦星"

Tu Youyou, a Chinese pharmacologist and winner of the 2015 Nobel Prize in Physiology or Medicine, is getting an asteroid named after her. 近日，一颗小行星以中国药理学家、2015年诺贝尔生理学或医学奖得主屠呦呦的名字而命

与美国小学生一起学英文第2册 第23期:世界

World 世界 When we say the world, we mean the planet Earth. 当我们说世界一词时，其实指的是行星地球。 The world is more than 4.5 billion years old, so it has a long history. 地球已超过45亿岁了，所以它有着漫长的历史

TED演讲:探索世界最深洞穴(4)

This gadget you see right here was called the digital wall mapper, 你们在这里见到的这个是电子墙体测绘仪， and it produced the first three-dimensional map anybody has ever done of a cave, and it happened to be underwater in Wakulla

纯正英语一分钟-planets

How did all the planets get there? How is it only our planet has life? Will we ever travel to other planets? These are questions I often think about. I think our planet is the best. It looks so beautiful from space with its mixture of blue and green.

万物简史 第28期:走进太阳系(6)

So if Pluto really is a planet, it is certainly an odd one. It is very tiny: just one-quarter of 1 percent as massive as Earth. If you set it down on top of the United States, it would cover not quite half the lower forty-eight states. 因此，如果冥

万物简史 第27期:走进太阳系(5)

As for Pluto itself, nobody is quite sure how big it is, or what it is made of, what kind of atmosphere it has, or even what it really is. A lot of astronomers believe it isn't a planet at all, but merely the largest object so far found in a zone of

小王子 第17期:独一无二的株花

His face turned from white to red as he continued: 他的脸气得发红，然后又接着说道： If some one loves a flower, of which just one single blossom grows in all the millions and millions of stars, it is enough to make him happy just to l

小王子 第33期:命令就是命令

The fifth planet was very strange. 第五颗行星非常奇怪， It was the smallest of all. 是这些星星中最小的一颗。 There was just enough room on it for a street lamp and a lamplighter. 行星上刚好能容得下一盏路灯和一个点

TED演讲：宏观历史(4)

And this is how it works. Gravity is more powerful where there's more stuff. 这就是它怎么运作的。重力场的作用力更大，拥有比较多的物质。 So where you get slightly denser areas, gravity starts compacting clouds of hydrogen

经济学人337:小行星采矿 淘铂去

Science and technology 科学技术 Mining asteroids 小行星采矿 Going platinum 小行星采矿淘铂去 Mining metals from asteroids seems a bonkers idea. But could it work? 小行星采矿这想法听似疯狂，但行得通吗？ CAN reality t

万物简史 第347期:孤独的行星(12)

In terms of adaptability, humans are pretty amazingly useless. 就适应能力而言，我们人类是很没有本事的。 Like most animals, we don't much like really hot places, but because we sweat so freely and easily stroke, we are especially v

万物简史 第344期:孤独的行星(9)

It has been suggested, not altogether cynically, that this was out of a purely contrarian instinct, 有人认为。而且不完全是挖苦地认为，这纯粹是出于一种敌对的本能。 and that if he had been born in the Soviet Union he woul

万物简史 第340期:孤独的行星(5)

If the pressure is changed too rapidlyas with a too-quick ascent by a diver, 要是压力变化太大比如潜水员上升太快， the bubbles trapped within the body will begin to fizz in exactly the manner of a freshly opened bottle of champagne, 体

万物简史 第339期:孤独的行星(4)

In the days of diving suitsthe sort that were connected to the surface by long hoses, 在使用潜水衣即用长管子连接水面的那种装备的年代， divers sometimes experienced a dreaded phenomenon known as the squeeze. 潜水员有时候会

万物简史 第341期:孤独的行星(6)

However, when at length they emerged into the fresh air of a London evening, 然而，当他们最后走进伦敦夜晚的新鲜空气里的时候， the bubbles sprang instantly to fizziness, memorably enlivening the digestive process. 气泡立刻泛

万物简史 第273期:砰!(8)

In a sense it hardly matters. 在某种意义上，这项工作并不很重要。 Identifying an asteroid doesn't make it safe. 确认一颗小行星不会使它安全一点。 Even if every asteroid in the solar system had a name and known orbit, 即使