有这样一个故事。古时候有一个渔夫，是出海打鱼的好手。他有一个习惯，每次打鱼前都要立下一个誓言。有一年春天，听说市面上的墨鱼的价格最高，于是他立下誓言：这次出海只捕捞墨鱼，好好赚它一笔。但这一次鱼汛所遇到的都是螃蟹，他非常懊恼地空手而归。等他上了岸，才得知 There is such a story. In ancient times, there was a fisherman who was a good fisherman who went to the sea to catch fish. He has a habit of making an oath every time before fishing. One year in the spring, I heard that the price of the cuttlefish on the market was the highest, so he vowed that he would only catch the cuttlefish in the sea and make a good fortune. But this time the rodents encountered crabs. He was very upset and left empty handed. When he arrived on the shore, he learned