英语听力：自然百科 大堡礁：珊瑚礁到雨林—2

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The Great Barrier Reef is over 2,000 kilometers long which means the lagoon¹ that lies between the out reef and Australian mainland is vast. An area one and a half times the size of the British Isles². 

 

Pick a spot anywhere in the lagoon and you'll probably find sand. As about two thirds of the sea floor here is a shifting under water desert. It looks barren, but there is life here. It's just you don't often see it. Gardenings and none-likely alliance, fish and shrimp³ that share a bone. In a world when most food is out of site, it takes a predator⁴ with special talents to find it. And this is that predator, the ray. The ray's special skill is to find living things under the sand and the largest species to do this here is the sting ray.

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