英语听力：自然百科 大堡礁：自然奇迹—2（在线收听） |
Many of the creatures are exquisitely beautiful, but some seem straight out of science fiction, while others can kill **. And just when you think you know the reef, it changes every second, every hour, every day, and every year. It's a world of continual surprises. This is the amazing story of an everchanging natural miracle, the Great Barrier Reef.The Great Barrier Reef is so large that it can be seen from space, quite an achievement considering the size of the creatures that built it. -A vast system that is the Great Barrier Reef is created by animals that are tiny. Although they might look like plants, actually they are animals called polyps.
Each polyp is like a tiny upside-down jelly fish sitting in a stony cup. They live together in colonies, like underwater tower blocks.
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