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两极之间 4 - 英语听力

两极之间 4-英语听力.mp3
[00:02.18]Day ten, and the mother has led her cubs...
[00:02.18]Day ten, and the mother has led her cubs a mile from the den.
[00:04.82]It's time to put them to the test.
[00:08.15]They've grown enormously in confidence, but they don't have their mother's sense of urgency.
[00:15.36]At last it seems that they're ready for their journey and they're only just in time, for a few miles from the coast the ice is already splitting.
[00:25.92]Now the mother can start hunting for the seals they must have, but she's leading her cubs into a dangerous new world.
[00:35.05]Nearly half of all cubs die in their first year out on the ice.
[00:40.38]Summer brings 24 hours of sunlight and the thawing shifting landscape.
[00:50.46]Further south the winter snows have almost cleared from the Arctic tundra.
[00:56.34]Northern Canada's wild frontier.
[00:59.72]Here nature stages one of her greatest dramas.
[01:04.76]Every year 3 million caribou migrate across the Arctic tundra.
[01:11.43]The immensity of the herd can only be properly appreciated from the air.
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