代目狗 代目狗是专门用来帮助盲人的导盲犬。我们把这种导盲犬称之为“代目狗”，因为它们是盲人的“眼睛”，帮助他们“看”东西。通常，这些狗要到特殊的学校接受几年的训练。 一天，一只导盲犬和一个盲人一起乘坐巴士。巴士上坐满了人，没有剩余的座位。不过，很快有个人站起来，离开了座位。导盲犬领盲人走到座位，但座位那里的空间很小。导盲犬开始用鼻子推两边的人。它推呀，推呀，直到人们退后，空出了两个人的地方。盲人于是坐在座位上，而狗则爬上紧靠盲人的座位。它躺着把头放在盲人的腿上。它很舒服，不久便进入了梦乡。巴士上的人对导盲犬的聪明发出会心的微笑，它不仅为盲人找到了地方，同时也为自己找到一席之地。

Lesson53 A Seeing — eye Dog
A seeing-eye dog is a special dog which helps blind people． We call these dogs “seeing-eye” dogs because the dogs are the “eyes” of the blind man and they help him to “see”． These dogs generally go to special schools for several years of training．
One day a seeing-eye dog and a blind man got on a bus together． The bus was full of people and there were no seats． One man， however， soon got up and left his seat． The dog took the blind man to the seat， but there was very little space．
The dog began to push the people on each side with his nose． He pushed and pushed until the people moved down and finally there was enough space for two people． The blind man then sat down and the dog got up on the seat next to him． He lay down and put his head on the leg of the blind man． He was very comfortable and soon fell asleep．
Everyone on the bus smiled at the intelligence of the dog in making space for the blind man and， at the same time， making a place for himself．