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英语听力：自然百科澳大利亚大堡礁 Great Barrier Reef—6

Like these sea fans, the last frontier of life on the reef. The divers reach their target-- a massive ridge, 190 feet down. Here, the air they are breathing is under pressure, squeezed down so that there's more gas in every lungful. They have to hope

发表于:2019-01-22 / 阅读(45) / 评论(0)

自然百科2011年

英语听力：自然百科澳大利亚大堡礁 Great Barrier Reef—7

The reef was left high and dry, exposed to air and harsh sun. A trillion tiny creatures died in their own homes. For the coral, it was an apocalypse. When the ice age ended, the sea came back and submerged the dead reef. But what brought it back to l

发表于:2019-01-22 / 阅读(46) / 评论(0)

自然百科2011年

英语听力：自然百科澳大利亚大堡礁 Great Barrier Reef—9

Here it is. Got it, I think. A spring. And whats actually coming out of this is fresh water. You can drink. You see this stuff bubbling out? This is what the traditional owners of this place call 'buiur bindi''fresh water in the ocean'. The locals ca

发表于:2019-01-22 / 阅读(42) / 评论(0)

自然百科2011年

英语听力：自然百科澳大利亚大堡礁 Great Barrier Reef—12

All lava has a chemical signature that tells scientists where it came from and when it was erupting. The higher up the old volcano, the more pristine the rocks will be. They are the last remaining evidence of the eruption which created this volcano m

发表于:2019-01-22 / 阅读(21) / 评论(0)

自然百科2011年

英语听力：自然百科澳大利亚大堡礁 Great Barrier Reef—16

The pearl luggers then turned their attention to something else, a much bigger target. The reef has always provided a great haven for large animals, like turtles who nest on the coral piece. Whole populations of turtles were brought to the verge of e

发表于:2019-01-22 / 阅读(21) / 评论(0)

自然百科2011年

英语听力：自然百科澳大利亚大堡礁 Great Barrier Reef—5

shows it really quite well. In order to bring back a piece of this mystery, his team of divers will be risking their lives. Diving problems, you got currents, tides, waves. We havent been here before. We haven't been this deep, though. One of those c

发表于:2019-01-22 / 阅读(42) / 评论(0)

自然百科2011年

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anthropogenic subclimax