将以下段落翻译成中文。
The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometers (1,400 mi) over an area of approximately 344,400 square kilometers (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland, Australia.
大堡礁是世界上最大的珊瑚礁系统，由2900多个单独的珊瑚礁和900个岛屿组成，延伸超过2300公里（1400英里），覆盖约344,400平方公里（133,000平方英里）。该礁位于澳大利亚昆士兰州海岸外的珊瑚海。