Hello and welcome to Words and Their Stories -- a weekly program from VOA Learning English. It can be said that the United States is a driving culture. The U.S., after all, is a big country and many Americans love cars. So, it is no surprise that many Americans English expressions come from the world of driving. One exciting example is "life in the fast lane."____________________________这里是美国之音慢速英语一周一期的词汇典故. 通常我们都说美国是一个具有汽车文化的国家.毕竟美国是一个大国,而且很多美国人都喜欢汽车. 因此,美国的很多英语表达来源于驾驶界也不足为奇了.一个让人感到激动的例子是"life in the fast lane"(紧张刺激的生活.)________________________