Three famous surgeons were bragging about（吹嘘，炫耀） their skills. "A man came to me who had his hand cut off," said one. "Today that man is a concert violinist（小提琴家） ." "That's nothing," said another. "A guy came to me who had his legs cut off. I stitched（缝纫，装订） them back on, and today that man is a marathon runner.""I can top both of you," said the third. "One day I came on the scene of a terrible accident. There was nothing left but a horse's posterior（后部，臀部） - and a pair of glasses. Today that man is seated in United States Senate."