英语听力：自然百科 海洋天堂大堡礁:堡礁内外—18

This is a known mindless killer. The shark is smart. It pitches up at the peak of the turtle nesting season, and simply waits for the tide to deliver its food.-Ah, look at that so distinctive...have the boat. Tigers are a big fan with all manner inte

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—20

It means the living can slip away for now, she'll not go far, she'll be back again up to 8 times during a single breeding season, to deposit up to 100 eggs on each visit, only then can she head back to her feeding grounds where who knows what will ha

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—23

This bleaching occurs because corals can only live in a narrow temperature range, healthy corals get their color from microscopic algae living in their tissues, these manufacture food for the corals by photosynthesis, but when the temperature rises j

江苏译林版牛津小学英语(3起)六年级下册:Unit6 Culture time

You'll find the Great Wall in China. 在中国，你可以看到长城。 You'll find Yellowstone National Park in the US. 在美国，你可以看到黄石国家公园。 You'll find Stonehenge in the UK. 在英国，你可以看到巨石阵。 You'

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—10

Each one of her clutch of a hundred eggs is the size of a pingpang ball, the soft shell prevents them from breaking as they drop into the hole, when she is finished, she'll cover the nest and over the coming weeks, her eggs will incubate in the warm

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—1

The great barrier reef is huge, it stretches for over 2,000 kilometers along Australia's north east coast, so vast it's clearly visible from space, and it's not simply a collection of coral gardens, but a network of very different habitats, it means

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—11

It's been an absolutely exhausting night for any of the turtles you can see behind me, in fact you can actually make out this old girl here, she is absolutely shattered, she is completely spent, and she is just desperately trying to get back into the

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—14

And extremely cold, at 4 degrees, it's the same temperature as the sea in the Antarctic, the ROV reaches a depth of 800 meters, not quite at the bottom, but not far off, a pilot of coral sand at the base of the reef wall slopes gently into the abyss,

英语听力：自然百科 海洋天堂大堡礁:堡礁内外—15

But that pales into insignificance, when compared to the daily vertical migration of these mircoscopic animals called zooplankton. At sunset, all of these tiny creatures swin upwards, and under cover of darkness, they grease on floating algae close t

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—8

For thousands of years, this powerful current has regenerated the reef. But it can not repair everything. Beneath the waves lie deeper scarsthe largest coral reef on Earth is home to a dazzling diversity of marine species, some found nowhere else on

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—11

So we're looking at the core of the volcano which is referred to as Mount Warning. That peak extends up to just a little over 1, 1 00 meters. But when it was active, the peak of this volcano was 6, 000 feet high. Millions of years of wind and weather

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

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—15

Today, the elements that support the reef are in fine balance--sun, wind and waves. But it doesn't take much to tip the balance, plummeting this huge reef into disaster. It might happen sonner than you think. Eighteen million years ago, a series of r

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

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—13

Eighteen million years ago, it arrived in warm, tropical waters. Only then could the world's greatest reef be born. Australia's epic journey may have created perfect conditions for coral, but it also put it in the line of fire of the most powerful st

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—1

Where the forces of nature meet? In a hidden world, a tropical miracle. At this moment, evolution is building a living colossus, a giant built by nature's tiniest creature, a model of reincarnation, a survivor born from disasterthe Great Barrier Reef

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—3

As a polyp grows, it puts up a wall of limestone around itself. And then it multiplies. Each polyp can produce thousands of offspring, which all work together to build a living fortress-- a coral reef. After just a few years, a single piece of coral

英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—4

Inside the flesh of these tiny animals are microscopic plants called algae, but these aren't parasites. None of this would be here without them. Wachenfeld: When the algae photosynthesize, they take energy from sunlight and carbon dioxide, then make

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

VOA双语新闻 - 地球暖化使大多数珊瑚礁岌岌可危

A new study says that a global agreement on climate change will come too late to save the majority of the world's coral reefs. The research comes as the Queensland state government announces a new multi-million dollar plan to protect the Great Barrie