And the ebbing tide has exposed a rocky reef. 退潮后露出了一块突出岩礁
One of the planet's most important breeding sites 对于一种特别珍贵的物种来说
..where 40% of the world's human population have made their homes. 而世界上40%的人口都居住在沿海处
..unless they can get out of the water. 否则它们将很快夭折