龟兔赛跑是一则寓言故事，讲述了一只乌龟和一只兔子比赛的故事。这个故事最早出现在古希腊神话中，被认为是道德教育和行为规范的一种方式。在这个故事中，乌龟代表勤奋和不放弃的精神，而兔子则代表自满和懒惰。

人教版的龟兔赛跑原文如下：

从前，有只兔子和一只乌龟。乌龟喜欢踏实努力，而兔子则爱好自满懒散。一天，兔子和乌龟决定比赛跑步，看看谁能先到达终点。

比赛开始了，兔子一开始跑得飞快。他跑了一段路程后，发现乌龟还在很远的地方，于是他决定在路边休息一会儿。不久之后，他睡着了。

乌龟一直在踏实地走路，一步一步地接近终点。虽然他一开始的速度很慢，但是他不断前进，一直没有停下来。最后，他终于走到了终点。

当兔子醒来时，他发现自己输了比赛。他非常惊讶，因为他一开始跑得很快。但是他忽略了乌龟的踏实努力，最终导致了自己的失败。

这个故事告诉我们，勤奋和不放弃的精神是非常重要的。不要因为一时的自满和懒散而放弃努力，否则可能会错失机会。

人教版的龟兔赛跑翻译如下：

Once upon a time, there was a rabbit and a tortoise. The tortoise liked to work hard and steadily, while the rabbit enjoyed being complacent and lazy. One day, the rabbit and the tortoise decided to have a race to see who could reach the finish line first.

The race began, and the rabbit started running very quickly. After running a distance, he noticed that the tortoise was still far behind, so he decided to take a rest by the side of the road. Before long, he fell asleep.

The tortoise kept walking steadily, step by step, getting closer to the finish line. Although his speed was slow at first, he kept moving forward without stopping. Finally, he reached the finish line.

When the rabbit woke up, he found that he had lost the race. He was very surprised because he had started running very fast. However, he had ignored the tortoise's steady effort, which led to his own failure.

This story tells us that the spirit of diligence and perseverance is very important. Do not give up because of momentary complacency and laziness, otherwise you may miss opportunities.