泛滥之谜 25-英语听力

[00:00.01]Finally [00:01.06]The Nile's great flood spills out of Ethiopia and across the flat lands of Sudan. [00:06.84]It sweeps past Khartoum, elbowing the steady flow of the White Nile aside. [00:12.76]And on through the deserts to revive and enrich the parched lands of Egypt. [00:18.92]Thousands of years ago [00:20.67]this was the great flood [00:22.83]that allowed the Ancient Egyptians to build a great civilisation. [00:27.88]But they passed into history without ever finding out [00:30.93]where the riches they depended on really came from. [00:33.76]The Nile has never given up its secrets easily. [00:43.62]Next week. [00:44.65]For centuries, mankind struggled to find the source of the White Nile. [00:49.24]It was this great prize that drew an army of explorers to Africa [00:53.13]men who were ambitious, dedicated, obsessed. [00:57.56]Their endeavours made them legends. [00:59.92]Doctor Livingstone, I presume. [01:01.24]And revealed why a river that flows through a desert never runs dry.