" Twenty Thousand Miles Under the Sea " was a science fiction novel written by France's Verne. It told the story of a submarine commanded by Captain Nemo, which encountered strange adventures in the process of exploring the abyss. Here are some questions and answers about the novel: Who is Captain Nemo? He was the captain of the submarine and the leader of the expedition team. How were submarines built? The submarine was designed and built by Verne himself. How does a submarine perform its mission in the deep sea? The submarine was equipped with advanced technology and communication equipment to communicate and navigate with the base on Earth in real time. At the same time, the submarine was also equipped with advanced weapon systems and medical facilities to ensure the safety of the expedition team. What dangers did the submarine encounter in the process of exploring the abyss? During the exploration of the abyss, submarines had encountered storms, earthquakes, floods, attacks by octopuses and other marine creatures, and many other dangers. How was the submarine expedition team formed? The submarine exploration team was made up of scientists, doctors, engineers, and soldiers. What were the stories of Captain Nemo's adventures? During the expedition, Captain Nemo and his crew experienced many adventures and challenges, including fighting octopuses, encountering sea monsters, communicating with aliens, and so on. What was the theme of 20,000 Miles Under the Sea? The theme of the novel was science and the spirit of exploration, as well as the exploration and discovery of the unknown world by humans.