在城市公共汽车上，我们常常可以看到这样一些“镜头”：一位有些绅士风度的男子一手拉扶手杠，一手拿着英文书在聚精会神地看着。边上是一位打扮入时的中年女子，肩背坤包，在眺望窗外风景，相安无事．突然，一个急刹车，将车内乘客弄得前倾后仰，那男子后仰时不慎碰到了那女 In the city bus, we often can see such “shots”: a gentlemanly gentleman hand arm lever bar, one hand in English book attentively watched. On the edge is a middle-aged dressed in a woman, shoulder bag, looking out the window scenery, no problem. Suddenly, a hurried brake, the passenger inside the car leaning forward lean back, when the man accidentally met the woman