英语听力:自然百科 秋日黄石公园 Autumn—5(在线收听) |
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 they go into the den to hibernate this winter. She is after / pine nuts too, they are 50% fat.
In a good year, a grizzly bear can put on 5 pounds a day, eating nuts alone.
If squirrels have done the hard work, it doesn't matter that grizzlies can't climb trees. The squirrel will just have to start again. Luckily this year the trees are being particularly generous.
A Clark’s Nutcracker, this is what the tree/ has been waiting for. With its perfectly shaped beak, it prizes the nuts from the cones and tucks them one by one into a special pouch under its tongue.
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原文地址:http://www.tingroom.com/lesson/zrbaike/2012/273766.html |