内容如下：
The hare and the tortoise
The hare was once boasting of his speed before the other animals. "I have never been beaten," he said, "when I run at full speed, no one is faster than me."
The tortoise said quietly, "I will race with you." "That is a good joke," said the hare. "I could dance around you the whole way."
The race started. The hare darted almost out of sight at once. He soon stopped and lay down to have a nap.
The tortoise plodded on and on. When the hare awoke from his nap, he saw the tortoise was near the finish line, and that he had lost the race.
古希腊的著名哲学家芝诺确实提出了这类问题，并论证说“阿基里斯追不上乌龟”。阿基里斯是全希腊跑得最哗卜快的快腿。据说在特洛伊的战将赫克托耳杀死了阿基里斯的朋友帕特洛克勒之后，阿基里斯在为朋友报仇乱锋穗中，以“快腿”的优势刺死了败逃中的赫克托耳。
就是这样一位“快腿”，芝诺却论证他追不上乌龟。芝诺提出，龟先行，阿基里斯在赶上龟以基消前，必须首先到达龟的出发点，而在他追至这一点时乌龟又爬行了一段路程，于是阿基里斯又必须赶上这段路，而此时龟又向前爬行一段路。这样一直追赶下去，虽然愈追距离愈近，但阿基里斯却始终追不上乌龟。
