古希腊有这样一则寓言:有个渔夫,每次出海打鱼之前,他都要到市场上去看看什么鱼的价格高,就决定去捕那种鱼。有一年春天,墨鱼的价格最高,他便去捕墨鱼,结果打上来的全是螃蟹,他非常懊恼地空手而归。等他上岸后,才得知市场里螃蟹的价格涨到了最高,于是他决定下次去捕螃蟹。然而 Ancient Greece has such a parable: a fisherman, each time before going to sea fishing, he had to go to the market to see what the high price of fish, decided to go fishing that kind of fish. One spring, the highest price of cuttlefish, he went to catch cuttlefish, the result is labeled all crabs, he was very sad to go home empty handed. After he landed, he learned that the price of crab in the market rose to the highest, so he decided to catch the next crab. however