Hello, respected user! " Twenty Thousand Miles Under the Sea " was a famous science fiction novel by a French author. The main content of chapters 21 to 47 was as follows: In Chapter 21, the protagonist Captain Nemo and his divers successfully crossed the Amazon River in South America and explored the mystery of the Amazon rainforest. In chapter 22, they encountered a mysterious creature-a sea monster. Its power was so strong that Nimo and his friends were terrified. In chapter 23, they continued to explore the Amazon River and found a huge cave with many precious artifacts and treasures. In chapter 26, Nimo and his friends encountered a mysterious island with a legendary temple that contained infinite wealth and treasures. In Chapter 27, they engaged in an intense battle in search of the temple's treasure and finally succeeded in entering the temple. In chapter 29, Nimo and his friends discovered a huge black hole. They tried to escape with the technology of the divers, but in the end, they did not succeed. In Chapter 30, they were forced to stay in the black hole and begin a long wait and suffering. In chapter 31, they finally found a way to leave the black hole, but they had to risk their lives to return to Earth. In chapter 32, they successfully returned to Earth, but Nimo and his friends were seriously injured and in critical condition. In Chapter 34, they decided to continue exploring the Amazon River and the Uncharted Sea in search of more treasures and secrets. In Chapter 35, they discovered a mysterious planet with unlimited resources and technology. In Chapter 36, they successfully established a base and began a new adventure. In chapter 37, they discovered a technology that could control the power of the ocean, which allowed them to control the entire ocean and realize their dreams. In Chapter 40, they successfully crossed the North Pole and explored the mystery and beauty of the North Pole. In chapter 41, they discovered a technology that could travel through time and space, which could fulfill their wish to travel through the entire universe. They successfully returned to Earth, but their adventure was not over yet. They would continue to explore the mysterious world. In chapter 44, they discovered a power that could control the weather, a technology that could fulfill their wish to change the climate of the entire world. They had successfully completed their adventure, but their lives had come to an end. In the end, they returned to Earth, but their spirit and will remained in the mysterious world forever.