Can dolphins talk?Of course they can’t talk with words,but they can talk with sounds(声音).They show their feelings with sounds.They always travel in a group.We call a group of fish a “school”.They do not study,but they travel together.Dolphins are not fish,but they swim together like fish in a school.Dolphins talk to the others in the school.They give information to each other.They talk when they play,and also when they’re happy or sad. They make sounds above(在…之上)water and make more sounds under water.People can’t hear these sounds because they are very high.Scientists make tapes of the sounds and study them. Sometimes people catch dolphins for an aquarium(水族馆),so we can watch them in a show.But they do not like to be away from their school in an aquarium.They are sad there.There are many stories about dolphins.A lot of people believe they can help people..A few years ago,a group of dolphins saved a swimmer’s life.Dolphin’s meat is good,but people don’t like to kill them.They say dolphins bring good luck and they’re our friends.