薇薇念的<<龟免赛跑>>

A rabbit meets a tortoise in a forest. He says to the tortoise, "Let's have a race!" "A race? OK!"

 The elephant is the judge. "Ready?Go!"

 The two begin to run. The rabbit runs fast and the tortoise walks slowly. The rabbit can't see the tortoise behind. He sees a big tree. "Ah-oh!", he yawns. He lies down and falls asleep under the tree.

 The tortoise keeps walking and is the first to get to the finishing line. The tortoise wins! He says,"I'm slow, but I'm number one!" Why?