文章列表

• 1.英语听力：探索发现 科学新发现：我们的大气层-6
• In contrast, Jupiter and Saturn are all atmosphere. Unlike Earth, Jupiter doesnt really have a solid surface that you could stand on and then have you...
• 2.英语听力：探索发现 科学新发现：我们的大气层-5
• 英语听力,探索发现,科学新发The mission had been a stunning success: Kittinger skydiving record stands to this day. He takes his first deep breath of ai...
• 3.英语听力：探索发现 科学新发现：我们的大气层-4
• Kittinger is in the mid stratosphere, a record 102,800 feet high. And it is now the time to make the long, swift journey down. When it came time for m...
• 4.英语听力：探索发现 科学新发现：我们的大气层-3
• My crew chief said, are you ready? I said, Im ready, lets go. It was a very smooth take-off and I started ascending up, up, up. 30 minutes after take-...
• 5.英语听力：探索发现 科学新发现：我们的大气层-2
• Our chemistry, our very nature, our metabolism is completely shaped by the atmosphere. To appreciate our atmosphere, well rise through its layers, tra...
• 6.英语听力：探索发现 科学新发现：我们的大气层-1
• In the empty blackness of space surrounded by hostile planets and freezing vacuum, planet Earth is an oasis of life. And all because of our protective...
• 7.英语听力：探索发现 2014-07-23 BBC 地平线：陨石的真相-31
• When you consider the Earths history stretching over billions of years, its clear that meteorite impacts, far from being unexpected, are just a normal...
• 8.英语听力：探索发现 2014-07-20 BBC 地平线：陨石的真相-30
• It came in in the daytime sky out of the Sun. Weve got telescopes looking out there for these objects, but they only work at night. Radar doesnt help ...
• 9.英语听力：探索发现 2014-07-18 BBC 地平线：陨石的真相-29
• Approaching from beneath the planet, asteroid 2012 DA14 passed inside the orbit of our geostationary satellites before heading off to the north. This ...
• 10.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 natur...