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！”