VOA慢速英语2014 恐龙在美国博物馆"再生"

Dinosaurs Live Again at an American Museum 恐龙在美国博物馆再生 Many millions of years ago, the last dinosaurs lived in what is now the American West. Now, scientists studying dinosaur fossils have documented what happened to the ancient cr

美联社新闻一分钟 AP 28岁候选人赢得民主党提名

This is AP News Minute. A 28-year-old candidate who has never held public office stunned the democratic party by beating one of its house leaders. Alexandia Ocasio Cortez defeated Congressman Joe Crowley of New York, once thought of as a possible fut

VOA慢速英语2011--After 30 Years, the Space Shuttle Progra

EXPLORATIONS - After 30 Years, the Space Shuttle Program Retires MARIO RITTER: I'm Mario Ritter. BARBARA KLEIN: And I'm Barbara Klein with EXPLORATIONS in VOA Special English. This week, we talk about the final American space shuttle flight. Last wee

科学美国人60秒 SSS 2014-08-29

From the depths of space, an asteroid hurtles toward Earth. [Well, our general vicinity.] But this is no ordinary hunk of galactic debris. Because the body of this asteroid seems to defy gravity. Its bound by forces never observed on this scale in sp

VOA标准英语2011--Juno Spacecraft Launches Toward Jupiter

Juno Spacecraft Launches Toward Jupiter The U.S. space agency launched the Juno spacecraft from the Kennedy Space Center in Florida Friday, beginning a five-year journey to Jupiter. 3,2,1. Ignition and liftoff of the Atlas 5 [rocket] with Juno on a t

万花筒 2013-02-18&02-20 俄罗斯遭遇陨石雨 民众恐慌

A meteorite bursting through the atmosphere over Russia injuring hundreds of folks on the ground. It happened overnight in the fringe of Siberia, sending shock to residents into a state of panic. ABC's Current Rania filed this report just moments ago

2018年CRI Moon Day special: China's lunar exploration program

Friday is Moon Day, which commemorates the first human landing on the Moon on July 20, 1969. To mark the occasion, let's take a look at China's lunar exploration program. The Chang'e program China's lunar exploration program started in 2004. It is na

英语听力：自然百科 地球力场 Earth's Force Field—6

It's clear from the fact that the Martian crust is strongly magnetized, that there must have been a magnetic field on Mars in the past, that the only way we know to magnetize rocks is for them to form in the presence of magnetic field. Why did Mars l

英语听力：自然百科 宇宙新领域 鲁特西亚真容曝光

Scientists are likening the new images from a large asteroid to discovery of a new world. Asteroid 21 Lutetia is located between Jupiter and Mars and the European Space Agency's probe Rosetta passed within about 2,000 miles of it, its onboard camera

英语听力：自然百科 神秘百慕大 bermuda triangle—9

It's very hard to tell. We've just hit the water. It's very hard to tell what altitude we're at. We've crashed the airplane at 930 feet. It seems clear that flying into that methane caused enough confusion in the instruments and with Thomas and he en

英语听力：探索发现 2014-07-16 BBC 地平线：陨石的真相-28

An asteroid strike would create a huge explosion. NASA feared this might even be mistaken for a nuclear bomb. We wanted folks to know this was a natural event by Mother Nature rather than some sort of man-made event like a missile or something dreadf

英语听力：探索发现 2014-06-13 BBC 地平线：陨石的真相-14

So was this a near miss for us? If the asteroid had been in a different part of its orbit, so it didnt hit this year but it hit next year, it would have still hit us on February 15th. But instead of coming in over Russia, it would have come in over t

英语听力：探索发现 2014-06-15 BBC 地平线：陨石的真相-15

On June 30th, 1908, a huge explosion tore through the forest of Tunguska, Siberia. It was 20 years before the Russians mounted an expedition to the site. What they found astonished them. 60 million trees across an area the size of London had been lev

英语听力：探索发现 2014-07-09 BBC 地平线：陨石的真相-25

Luckily, the very biggest asteroids are few and far between. But there are still plenty of rocks out there that represent a significant danger to us. So, at the summit of an extinct Hawaiian volcano, Professor Nick Kaiser and his colleagues are searc

英语听力：探索发现 2014-07-11 BBC 地平线：陨石的真相-26

Tim has developed a map to visualize their location. And on that map, the most important are the Near-Earth asteroids, the ones closest to the planet. On the screen here is a map of the solar system. And Ive got the Sun in the centre and the third pl

英语听力：探索发现 2014-06-06 BBC 地平线：陨石的真相-11

Weknew from the radar measurements where Golevka was within a few tens of metres.And yet it was actually 12 or 15 kilometres away from where it was predicted tobe without Yarkovsky effect. So these very precise radar observations allowedus to see the

英语听力：探索发现 2014-06-04 BBC 地平线：陨石的真相-10

Heset out to investigate a hundred-year-old theory that said asteroids werepowered by the Sun itself. It was called the Yarkovsky effect. The Yarkovskyeffect is a very small acceleration and acts on asteroids and what it is is ifyou take a model, the

英语听力：探索发现 2014-05-18 BBC 地平线：陨石的真相-4

Amazing images. But what can you get out of these asan expert? What it shows us, first of all, is a great record ofthe entry of the object into the Earths atmosphere. So you see it right fromthe moment it really penetrated. And there it is. That is t

VOA常速英语2008年-California Museum Visitors Watch Dinosaur Being

By Mike O'Sullivan Los Angeles 21 April 2008 A 66-million-year-old dinosaur is being readied for exhibition in Los Angeles. Mike O'Sullivan reports, visitors can watch scientists as they work on the remains of the Tyrannosaurus rex known as Thomas. U

英语听力：自然百科 行星旅行指南：火星 Mars—10

But still be able to use your hands. Not only will you want to move your fingers, you want to move around. NASAs lunar electric rover is a prototype for future missions to the moon and Mars. Its part vehicle and part space suit. I can just picture be