英語笑話:An Exact Number（準確數字）

A tourist was visiting New Mexico and was amazed at the dinosaur bones lying about.　　"How old are these bones?" the tourist asked an elderly Native American, who served as a guide. 　　"Exactly one hundred million and three years old. 　　"How can you be so sure?" inquired the tourist. 　　"Well," replied the guide, " a geologist came by here and told me these bones were one hundred million years old, and that was exactly three years ago.一位遊客在新墨西哥遊覽。他對隨處可見的恐龍化石甚感驚奇。 　　“這些化石有多長的歷史？”遊客問一個上了年紀的當地美國人。他是作嚮導的。 　　“整整十億零三年了。” 　　“你怎麼這麼肯定？”遊客問道。 　　“哦，”嚮導回答道，“一個地質學家來過這兒，他告訴我說這些化石有十億年了，再加上那是整整三年前的事了。”