是《伊索寓言》里的《龟兔赛跑》吧?
（楼主也可参考下面的链接）
The Tortoise and the Hare
The Hare was once boasting of his speed before the other animals."I have never yet been beaten," said he,"when I put forth my full speed.I challenge any one here to race with me."
The Tortoise said quietly,"I accept your challenge."
"That is a good joke," said the Hare; "I could dance round you all the way."
"Keep your boasting till you've won," answered the Tortoise."Shall we race?"
So a course was fixed and a start was made.The Hare darted almost out of sight at once,but soon stopped and,to show his contempt for the Tortoise,lay down to have a nap.The Tortoise plodded on and plodded on,and when the Hare awoke from his nap,he saw the Tortoise just near the winning-post and could not run up in time to save the race.
Then the Tortoise said:"Slow but steady progress wins the race."