从前,有这样一件事:一个商人向荷兰渔民购入5000吨青鱼,装在船上,从荷兰一个城市运到靠近赤道的非洲城市——马加的沙港去。到了那里,一过秤,发现青鱼少了将近19吨。奇怪!到哪里去了呢?被盗是不可能的,因为轮船沿途并没有靠过岸。当时大家都无法得知事实的真相。 In the past, there was such a thing: a businessman bought 5,000 tons of herring from Dutch fishermen, loaded it on a ship, and transported it from a Dutch city to the sand port of Magha, an African city near the equator. When they got there, they weighed and found that the herring was nearly 19 tons less. Strange! Where did you go? Stolen was impossible because the ship did not cross the shore along the way. At that time, everyone could not know the truth.