Once upon a time a man from the State of Chu was crossing a river by boat.But carelessly his sword fell into the water.Immediately he made a mark on the boat.He said,"This is where my sword fell off."

　　从前，一位来自出国的人正乘船过河。可是一不小心他的剑掉到了水里。此人立刻在船上做了个记号。他说，“我的剑是从这儿掉的。”