The Great Barrier Reef, off the coast of Australia, is the world's largest coral reef. Home to a diverse array of marinelife, it is one of the natural world's outstanding sites of beauty. But environmental changes now threaten the reef,prompting fears that this natural wonder may not be here for future generations to see.

    位于澳大利亚沿岸的“大堡礁”是世界最大的珊瑚礁。此地栖息着各类海洋生物，是自然界中风景秀丽的胜地之一。但是现在，环境的变化却使这片礁地受到了威胁，引发了后世之人可能无法在这里目睹这一自然奇迹的忧虑 ......