文章列表

• 1.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 larges...
• 2.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. ...
• 3.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 bre...
• 4.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 c...
• 5.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. Wache...
• 6.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 ...
• 7.英语听力：自然百科 澳大利亚大堡礁 Great Barrier Reef—2
• Where every plant and animal helps sustain the whole.The waste from parrot fish cements the reef. Stinging anemones provide a haven to the vulnerable....
• 8.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 natu...
• 9.英语听力：自然百科 野性俄罗斯之西伯利亚 Siberia—18
• They wont be strong enough to challenge for females until they are five years old. Til that day, they will regularly hone their sparring skills. They ...
• 10.英语听力：自然百科 野性俄罗斯之西伯利亚 Siberia—17
• Three thousand five hundred meters up in the Sayan Mountains near the Russian-Mongolian border, Siberian ibex search for food. They scratch a living f...