泛滥之谜 14-英语听力

[00:00.01]Upstream from Khartoum, the Blue Nile flows through dry savannah. [00:05.14]Then, on the fringe of the Ethiopian Highlands [00:08.91]the river emerges from deep inside a gorge so steep and hostile [00:14.26]that it has claimed the lives of many who've tried to explore the river further. [00:18.96]But the bottom of this gorge shows little promise of a great flood. [00:23.18]It's barren. [00:25.41]This is a tough place to make a living. [00:28.46]They're crossing the dried-out river bed of the Blue Nile. [00:31.71]Right now it's no more than a trickle [00:35.28]just enough to warrant a trek of many hours to bring livestock to drink. [00:41.15]But the huge boulders that cover the river bed [00:44.32]suggest that at some time a powerful force of water must flow through here. [00:50.31]The lammergeyer, Africa's mountain vulture [00:53.80]seeks out those who succumb to the heat and the drought. [00:58.18]In this brutal season, the lammergeyer will have plenty to choose from.