Poll is a donkey(驴子) on an island(岛). He likes to walk here and there. Soon he gets bored of it. "If I go to a new place, that will be better," he thinks. "It's not a good idea to leave our island. And we are friendly," all the friends say to Poll.
On a fine day he goes to another island. It is a quiet place and there are few people there. Poll eats a lot every day." Soon he becomes fat and can't run fast.
One day, a farmer sees Poll and catches(抓住) him. He rides Poll every day and doesn't even give him enough(足够) to eat. Poll becomes thin again.
One night, Poll flees(逃离) from the farmer's house. He goes back to his island and decides not to leave his friends forever.