文章列表

• 1.英语听力：自然百科 行星旅行指南：火星 Mars—15
• If we have been wet, then we want to look for nutrients and food sources that could support microbes. The water ice is proof of a valuable resource fo...
• 2.英语听力：自然百科 行星旅行指南：火星 Mars—14
• When we reconstruct our imaginations, Mars are 3 billion years ago. We tend to make it like Earth, warm and clozzying, but it wasn't. Mars back in its...
• 3.英语听力：自然百科 行星旅行指南：火星 Mars—13
• You can make estimates of how much water had to have been flowing that carved these things, and you get numbers like 100, 200 Amazon rivers all cut lo...
• 4.英语听力：自然百科 行星旅行指南：火星 Mars—12
• Try the red planet for sight-seeing on an enormous scale. Thanks to our sharp-eyed spacecraft, Mars is opening up like never before. These are real la...
• 5.英语听力：自然百科 行星旅行指南：火星 Mars—11
• It was 119 Fahrenheit here yesterday; really, really, really hot day on Mars ever get up to about 30 Fahrenheit and at night it goes to more than 100 ...
• 6.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 f...
• 7.英语听力：自然百科 行星旅行指南：火星 Mars—9
• Want to step outside to take in the scenery or pick up some rocks? As familiar as it might look beyond the port hole, Mars is dangerously alien. The u...
• 8.英语听力：自然百科 行星旅行指南：火星 Mars—8
• Before we take this giant leap, we need to be able to carry everything needed for a three-year -round trip with us. This is a much larger effort than ...
• 9.英语听力：自然百科 行星旅行指南：火星 Mars—7
• A test run before attempting the fuel hungry and risky trip to the planet below. Dreaming about Mars and actually going there are two very different t...
• 10.英语听力：自然百科 行星旅行指南：火星 Mars—6
• Steve Squyres Martian odyssey has taken him from pole to pole, visiting those places on earth that share at least some of the same characteristics. Th...