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.

一位游客在新墨西哥游覽，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？游客問一個上了年紀的當地美國人，他是作向導的。整整十億零三年了。

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.

你怎么這么肯定？游客問道。哦，向導回答道，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。