两天前,儿子独自一人来到这个城市。现在,父亲要送他回去。他们来到火车站,却在候车室的入口停了下来。两个人盯着安检仪的小屏幕,那上面不断流动着各种箱包和编织袋的轮廓。父亲说:“把行李放进去,屏幕上就会照出行李里面的东西……你看看,这是一个脸盆……这应该是一床被子……这个,是一双皮鞋吧。”“可是,它为什么能照出里面的东西呢?”父亲 Two days ago, the son came to this city alone. Now, my father will send him back. They came to the train station, but stopped at the entrance of the waiting room. Two people stared at the small screen of the security device, which continuously flowed all kinds of bags and bags outline. Father said: “Put the baggage in, the screen will show out the contents of the luggage ... you see, this is a washbasin ... This should be a quilt ... This is a pair of leather shoes.” “ ”But why does it shine inside?“ ”Father