Professor Green, known to the world as a scientist, is not only ab sent- minded but shortsighted（近视眼） as wel. His mind is always busy thinking about scientific problems and he seldom notices what is going on around him One fine day recently, he went for a stroll （Hy） in the country side, but as usual he had a book in his hand, and had no sooner set out for his walk than he became aborted （tt） in reading. He hadn't gone far when he bumped （it）into a big cow and fell down. In the fall, he had lost his glasses without which he couldn't see. He thought he had hit head against a fat lady. I'm sorry, Madam. he said politely before searching for his glasses. As soon as he had put them on, he realized his mistake Soon he was fixing his mind on his book again and paid no attention to five minutes when he fell over again, losing both his book and his glasses. This time he got very angry, seizing his umbrella, he gave the "cow"a wild blow. Then after finding his glasses, he realized with hor ror that he made a second mistake. A large fat woman was fleeing from him in a horror（恐惧地）.