A short young man was running behind a bus which was full of passengers. But the bus still ran at a great speed.  
"Stop, stop, " a passenger looked out of the window, and shouted at the young man, "you can't catch it ! "   
"I must," the young fellow said, out of breath, "because I'm only driver of the bus.

在一辆满载乘客的公共汽车后面,一位小个子青年在奔跑着。气车仍在高速前进。 “停下吧,”一位乘客把头伸出窗子,对小个子喊道,“你追不上的!”   
“我必须追上,”小个子气喘吁吁地说,“我是司机!”