文章列表

• 1.英语听力：自然百科 行星旅行：土星 Saturn—6
• Everyone is familiar with the rings of Saturn. But what would you highlight if it were you sending back the postcards? Every tour itinerary has one ma...
• 2.英语听力：自然百科 行星旅行：土星 Saturn—5
• With Saturn's 62 known moons, Cassini finds itself in good company without of this world photo opportunity to make even a seething professional gasp. ...
• 3.英语听力：自然百科 行星旅行：土星 Saturn—4
• Hopes and dreams of thousands of scientists and engineers are resting on the next few moments. Weve been to Saturn twice before with the voyager I and...
• 4.英语听力：自然百科 行星旅行：土星 Saturn—3
• Saturn might be the second largest planet in the solar system, but like gas giant neighbor Jupiter, its a triumph of show over substance. Saturn, firs...
• 5.英语听力：自然百科 行星旅行：土星 Saturn—2
• Imagine boarding a flight to Saturn, what would you need to know before traveling? The best ringside vantage points? The must-see moons? Think of this...
• 6.英语听力：自然百科 行星旅行：土星 Saturn—1
• No planet beats Saturn for jaw-dropping beauty. Saturn is the most photogenic planet in all the solar system. Some of the pictures are to die for. But...
• 7.英语听力：自然百科 行星旅行指南：火星 Mars—19
• So in some ways, a voyage to Mars could be a voyage home. Our ancestors have made such bold trips before when we walked out of Africa, when we sailed ...
• 8.英语听力：自然百科 行星旅行指南：火星 Mars—18
• There is no room to screw up on a trip like this, mental or otherwise. Once on Mars, you are likely to be stuck there for a year or more, waiting for ...
• 9.英语听力：自然百科 行星旅行指南：火星 Mars—17
• It is chemically impossible for methane to survive for long in the Martian atmosphere, so it must have been released recently. Now what makes methane?...
• 10.英语听力：自然百科 行星旅行指南：火星 Mars—16
• If we are looking for Martian bugs, we should search for life forms at least as tough and alien as this. Im looking at Mars in a point of view of a mi...