Australia 南半球之神奇大陆7
You hope that it will never ever happen to you, you know. But, yes, there are some odds, you know, which can, can one day, you know, may be created.34p中国英语学习网
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Technology improves the odds.34p中国英语学习网
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Tidal beacons transmit water depth, crosschecked with sonar, and double-checked by experience. Two hundred and thirty years ago, a collision changed the course of Australian history. British explorer Captain James Cook ran aground here. Had he not been able to make repairs, he could never have sailed home to claim Australia for his king. With watertight safety procedures, the Great Barrier Reef is negotiated many times a day without incident. A delicate balance, tipped in the reef's favor, by seaman like Kinsky.34p中国英语学习网
34p中国英语学习网
The scale of life here is staggering, even for Australia. Per cubic yard, there's more species than in any other environment on the planet. On a single reef live more fish varieties than the entire Caribbean- more than 4,000 humpback whales winter in the reef's warm waters, finding mates and birthing calves. Almost one-third of the world's shark species are found here, ranging in size from the one-foot dog shark to the 25-foot great whites. Sharks are one of the three biggest Australian predators.34p中国英语学习网
34p中国英语学习网
Perhaps the most infamous lives in other waters- in the coastal rivers of Australia's north. Salt-water crocodiles, the largest reptiles on the planet, are once hunted to the edge of extinction. For three decades, they've been protected and they're perhaps the only thing that keeps Australians out of water. In truth, fewer than 30 people have been killed in the last three decades. 34p中国英语学习网
34p中国英语学习网
By contrast, Australia's third largest predator stalks the interior and it’s spawned an outrageous feat of engineering.34p中国英语学习网
34p中国英语学习网
Along with me, my structure in the world and it's mostly visible from outer space, a big job to, (to continue), to keep up the maintenance on it.34p中国英语学习网
34p中国英语学习网
Stretching 3,500 miles, cordoning off one quarter of Australia, this fence defenses livestock from Australia's wild dog- the dingo. These wildly creatures are another immigrant brought in by Asian seafarers 4,000 years ago. The dogs learned to hunt bouncing kangaroos and elusive wallabies. So docile livestock are no contest, hence, the great wall of Australia.34p中国英语学习网
34p中国英语学习网
You know the dogs are a very smart animal, obviously very cunning, nothing uncommon for the, for dingo or wild dog to move, you know, say, seek to hide if they’re a hundred cheap annoyed.34p中国英语学习网
34p中国英语学习网
Jerry Stanley maintains half the wild dog fence, more than a quarter of million fence posts, 1,500 miles of wire mesh. Jerry's job never ends. Mending fences is his life's calling.34p中国英语学习网
34p中国英语学习网
water: so tightly made that water cannot enter or escape34p中国英语学习网
34p中国英语学习网
34p中国英语学习网
34p中国英语学习网
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