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  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—9

    This could be the most terrifying sight in the solar system: clear skies above a bottomless pit, an infernal drop into the depth of Jupiters endless sky. You may have raindrops evaporating into the hot interiors of Jupiter, but there is no ocean down...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—8

    Picture a suicide dive into the mysterious depth? Relax, Galileo's already done it for you. We separated the probe from the Galileo mother ship. We were flying in toward Jupiter, basically a ballistic bullet. The Galileo probe went in at an unbelieva...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—7

    If you are floating in a balloon, the center of the red spot might be rather calm. But you will be going fast, your balloon will be going faster than the hurricane winds, but it might be a smooth ride. This storm is a sigh to the halt, towering five...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—6

    When the space hardened Voyagers I and II flew past in 1979 on their way to the outer solar system, Jupiters great mysteries only deepened. How were these powerful magnetic storms generated inside a giant ball of gas? Why was one moon boiling with vo...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—5

    Halfway there, you bump into the Asteroid Belt. It is not like in the movies where you are dodging asteroids at every second. It is a The space is very big and the asteroids are a long distance apart, so you could travel through it quite safely. The...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—4

    Jupiter is a planet that knows how to exert its influence on the solar system, and how to impress even the season traveler. You can fly around the earth in a jumbo jet in less than two days. Try this on Jumbo Jupiter and youll be in the air for three...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—3

    This giant gas bag is built from the flimsiest materials in the universe. But for all its squishy bulk, its a great little mover. Jupiter spins at such a breakneck speed that it bulges at the equator, so fast in fact that a day here lasts less than t...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—2

    Oh, man, thats incredible!.... A tour of the solar system wouldnt be complete without a visit to its largest planet, but with the grandest sights, biggest dangers and greatest mysteries all on the itinerary, it pays to brush up before blast off. Cons...

  • 英语听力:自然百科 行星旅行指南:木星 Jupiter—1

    Life feeling a bit ordinary? Travel choices a bit tame? Head beyond the asteroid belt for an out-of-this-world experience. Welcome to Jupiter, home of high-adrenaline adventure. Plunge into its mysterious depth. You drop through the clouds, it would...

  • 英语听力:自然百科 秋日黄石公园 Autumn—20

    As the snow returns to Yellowstone, it seems like the clock is turning back. All traces of the human world are covered up. A reminder that when the heart of this great wilderness was made a national park nearly 140 years ago, it was one of the most r...

  • 英语听力:自然百科 秋日黄石公园 Autumn—19

    But now, the final act of the season is about to take place. From out of apparently nowhere come the bighorn sheep, the toughest of all Yellowstones animals. They can stay here all winter on slopes and crags that the biting wind keeps clear of snow....

  • 英语听力:自然百科 秋日黄石公园 Autumn—18

    his is a tree that needs a cold winter. Its now November and the elk have found their feeding grounds just in time, the snows of winter at their heels. Here they join other herds who come to this place every year, where the snow would be less deep an...

  • 英语听力:自然百科 秋日黄石公园 Autumn—17

    And for every dam, there is a new habitat for new life, and a richer, more diverse Yellowstone. But just as Yellowstone reveals the complexity of life, it also exposes its fragility. On its lofty ridges, there are signs that all is not well with the...

  • 英语听力:自然百科 秋日黄石公园 Autumn—16

    The return of the wolf will always be controversial. But evidence is now emerging that wolves are far more important than anyone imagined, especially back in the heart of Yellowstone. It's nearly the end of October. The cold autumn nights have brough...

  • 英语听力:自然百科 秋日黄石公园 Autumn—15

    Ranchers will tolerate elk as long as they don't compete too much with their cattle. But as the elk move in, their old enemy follows them out of Yellowstone, an animal that's more difficult for ranchers to accept. In their minds, fear of the wolf run...

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