有这样一个故事:在挪威,人们爱吃沙丁鱼,许多渔民都以捕捞沙丁鱼为业。由于沙丁鱼不爱动,捕捞上来之后很容易死去。但有一个老渔民捞上岸的沙丁鱼总是活蹦乱跳的,每次都能卖个好价钱,于是有人向老渔民取经,原来,诀窍就是把一条鲇鱼放进存放沙丁鱼的鱼舱里,由于鲇鱼是沙丁鱼的天敌,从而刺激沙丁鱼“四处逃窜”。这样一来,鱼舱里面的水不断波动,氧气充分,最后就保证沙丁鱼抵岸交易的时候还是鲜活的。人们在高兴地买下沙丁鱼 There is a story: in Norway, people love to eat sardines, many fishermen are fishing for sardines. Because sardines do not like to move, after fishing, it is easy to die. However, an old fisherman who sits ashore sardines is always alive and well. Every time he can sell a good price, some people try to learn from the old fishermen. The trick is to put a tuna into the sardine’s fish tank, Sardines are natural enemies, thus stimulating sardines “to flee around.” In this way, the water in the fish tank is constantly fluctuating and full of oxygen, finally ensuring that the sardines are still fresh when they trade on the shore. People are happy to buy sardines