我给你编一个吧，有意义就行： This story is about a cat, a fish and a butterfly. One sunny day, a cat was very hungry to go fishing, a moment later, he got to a lake... and started to catch fish. Time was going, the cat was waiting for a fish to eat the food and a fish was checking the food. At that key moment, a butterfly came here and flied aroud of the cat nearly, she is very beautiful, the cat likes her very much, so he throwed down fishing net to catch the butterfly,but he was not sccessful. And the fish ate the food and leaved. there was just a hungry and angry cat. Nobody knows if the cat didn't go to catch the butterfly, whether the fish would be catched or not, but all of us know if the cat didn't go to catch the butterfly, the fish may be a lunch of the cat at least, this is the action of undivided attention.