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  • 英语听力:自然百科 秋日黄石公园 Autumn—11

    Groves of aspen/ all turn at the same time, each grove descended from one tree interconnected by roots, color coordinated. As cold air sinks further down from the mountains, it brings autumn mist to Yellowstones valleys. It was in the autumn of 1870...

  • 英语听力:自然百科 秋日黄石公园 Autumn—10

    In just a few weeks, this lake will be frozen, and the beavers wont be able to cut and move trees, but they will be able to swim right under the ice to feed from this underwater larder. Moose also eat twigs and branches and often try to take advantag...

  • 英语听力:自然百科 秋日黄石公园 Autumn—9

    It cuts branches into more manageable lengths and then swims them down a network of purpose-built canals towards the dam. The pond to give this beaver protection from predators, and the canals allow it to forage far into the forest, carrying many tim...

  • 英语听力:自然百科 秋日黄石公园 Autumn—8

    They may be a little safer here. But the food in the forest is far less nutritious than on the riverbanks. If they want to eat well and avoid wolves this winter, they'll need to keep on moving. As the elk move gradually downwards, they follow the riv...

  • 英语听力:自然百科 秋日黄石公园 Autumn—7

    Its now September, and the elk/ have made their way down to graze where the grass on the riverbank is still green, and they can browse the nutritious shoots of young willow trees. The males are now upping their game. This bull urinates on himself to...

  • 英语听力:自然百科 秋日黄石公园 Autumn—6

    Up to 150 at a time, a fifth of its entire body weight. Then it flies as much as 15 miles away, and drills the nuts into the ground in sets of ten, placing a stone on top of the stash to mark the site. It goes back for more and more. Over the autumn,...

  • 英语听力:自然百科 秋日黄石公园 Autumn—5

    But this is not much good for the tree. Its seeds have gone nowhere. A grizzly bear mother and cubs. It's unusual for a grizzly to have so many cubs. This mother has found two orphans, and adopted them. But now she has four cubs to fatten up before t...

  • 英语听力:自然百科 秋日黄石公园 Autumn—4

    But as many are preparing to get out, some have no choice but to stay. In the remote northeast of the Yellowstone wilderness, are the Beartooth Mountains. Here, surviving about 8,000 feet, a tree now welcomes the change of / season, the white-bark pi...

  • 英语听力:自然百科 秋日黄石公园 Autumn—3

    The sun has revitalized this place, and now there are more living things here than at any time of the year. The summer has brought visitors too who are enjoying Yellowstone at its most vibrant. As the sun now starts to get lower in the sky, the rich...

  • 英语听力:自然百科 秋日黄石公园 Autumn—2

    All over Yellowstone, male elk are challenging each other for dominance. The sound of Yellowstone's autumn. They're trying to win the admiration of females and gather them into a hareem, only then do they stand a chance of mating with them before win...

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