英语听力：自然百科 黄石公园的夏天 Yellowstone—8

This pack seem prepared to allow their young a brief foray to experience the world beyond their den. Even in Yellow Stone it is extremely rare to see wolf pups like this. Before long they are summoned back into the forest by the pack. It will be wint

英语听力：自然百科 黄石公园的夏天 Yellowstone—2

The end of winter comes late to the mountainous northwest of the United States, and in particular, it lingers in Yellowstone. The heart of Yellowstone is a high cold plateau, 8,000 / feet up, surround by the spires of the Rocky Mountains. After five

英语听力：自然百科 黄石公园的夏天 Yellowstone—9

This pack seem prepared to allow their young a brief foray to experience the world beyond their den. But his high-octane lifestyle critically depends on the summer sun. And in Yellowstone, that's never a guarantee. In the mountains surrounding the pl

英语听力：自然百科 黄石公园的夏天 Yellowstone—15

As the thaw reaches up into the mountains, a part of Yellowstone that few ever see is briefly revealed. From its first day above the snow, this pika is obsessed by food. It's in a frantic race to restock its winter larder before the snow closes in ag

英语听力：自然百科 秋日黄石公园 Autumn—1

Yellowstone, volcanic wonderland, two million acres of wild space, right in the heart of North America. The heat of the summer has unveiled the full extent of the Yellowstone wilderness, and for a few precious months it has blossomed. But now, Yellow

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—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—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—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—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—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—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—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

英语听力：自然百科 秋日黄石公园 Autumn—13

To stay is to face the certainty of snow and wolves. To go offers the chance of an easier life, but the uncertainty of the world beyond Yellowstone. Every autumn, thousands of elk do leave Yellowstone, and as they go, they cross an invisible line out

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—12

Now he must gather the last of his strength. The rival wants to take him on. The aim is to get an antler point into his neck. But they are evenly matched. Neither can penetrate the other's guard. Now, it's all about power. A well-aimed thrust or a br

英语听力：自然百科 秋日黄石公园 Autumn—14

By now the pronghorn have pushed further than any of Yellowstones animals, out of forests, through farmland and down into the wide prairies at the foot of the Rocky Mountains themselves. Their search for winter grazing takes them over a hundred miles

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

中国男子在黄石公园舀水被罚款

YELLOWSTONE NATIONAL PARK Wyo. (AP) A tourist from China was fined $1000 for walking off a boardwalk at Yellowstone National Park and collecting thermal water apparently for medicinal purposes park officials said Wednesday. 黄石国家公园官方本周