文章列表

• 1.英语听力：探索发现 2014-07-13 BBC 地平线：陨石的真相-27
• On 6th October 2008, asteroid hunter Richard Kowalski saw something that would change the assessment of threats presented by asteroid impacts. The nig...
• 2.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....
• 3.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. ...
• 4.英语听力：探索发现 2014-07-06 BBC 地平线：陨石的真相-24
• The meteorite was 15 kilometres across, enough to cause utter devastation across the whole planet. It exploded with a force of 100 million million ton...
• 5.英语听力：探索发现 2014-07-04 BBC 地平线：陨石的真相-23
• As the divers have explored further, they discovered the Siluteis are actually part of a huge complex of tounels and caves.In fact, when you look from...
• 6.英语听力：探索发现 2014-07-02 BBC 地平线：陨石的真相-22
• Look at the size of this! This is magnificent! That is beautiful. This cave may be stunning, but it provides the evidence for one of the greatest cata...
• 7.英语听力：探索发现 2014-06-29 BBC 地平线：陨石的真相-21
• Comparing the effects of an airburst with a ground strike, it seems the Chelyabinsk got away lightly. Its estimated that the largest piece to hit the ...
• 8.英语听力：探索发现 2014-06-27 BBC 地平线：陨石的真相-20
• Oh, perfect, perfect, perfect. Now were seeing the fireball come in, its brighter than the Sun and then, Kapow, it hits the surface. Jeez! This whole ...
• 9.英语听力：探索发现 2014-06-25 BBC 地平线：陨石的真相-19
• So this was serial number one. It was built during the Apollo time. I guess because they thought there would be several of them made, but this is the ...
• 10.英语听力：探索发现 2014-06-22 BBC 地平线：陨石的真相-18
• Down on the ground, the scale of impact is even more breathtaking.The crater is more than 1000 meters across and nearly 200 meters deep.The forces her...