古希腊雅典的一个运动场附近，有一所仿佛花园的地方。园中游径上时常出现一位五十岁左右的老人自由自在来回散步。他身边紧跟着一些年轻人。一路上老人口中断断续续说话，好像是随意谈天。青年们却都是聚精会神仔细听讲。有时也有问答，谈笑风生，夹着辩论，又不大像上课。不 Near a stadium in Athens, Greece, there is a place like a garden. In the middle of the park, a 50-year-old man often walks and walks freely. He was followed by some young people around him. The old population interrupted intermittently all the way to speak, as if free to talk. Young people are attentive attentively listened carefully. Sometimes there are questions and answers, laughing, holding a debate, but not like the class. Do not