英语听力：自然百科 黄石公园的夏天 Yellowstone—5（在线收听） |
As 6 months of snow and ice begins to melt, Yellowstone starts to come back to life. Cascading snowmelt swells the streams and rivers. It's a hazard that the migrating herds must cross. Young are barely up to the task.
The Yellowstone river has increased its flow tenfold.
In less than two weeks, the thaw has brought a remarkable change to the heart of Yellowstone
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| 原文地址：http://www.tingroom.com/lesson/zrbaike/2012/273739.html |