故事原文：

从前有个人坐船过河时，不小心将随身携带的宝剑掉入水中。同伴们都劝他赶紧跳下水去寻找，可他却笑着拿出小刀，在船舷上刻下一个记号，说：“不用着急，我的剑是从这儿掉下去的，等船靠岸后，我顺着这个记号就能找到。”

众人疑惑不解，他却不以为然地解释道：“我的剑是固定在这个位置掉下去的，只要找到这个标记，就能轻松捞回我的宝剑。”

待船靠岸后，他依照记号潜入水中，却怎么也找不到那把剑。众人纷纷摇头叹息，而他也只能尴尬地站在一旁。

寓意：

这个故事告诉我们，事物是不断发展变化的，我们不能墨守成规，用固有的思维去解决问题。如果只盯着过去的位置而不考虑实际情况的变化，就很容易南辕北辙，甚至徒劳无功。

译文：

Once upon a time, a man was crossing the river by boat when he accidentally dropped his precious sword into the water. His companions urged him to jump into the water and search for it immediately, but he just laughed and took out a small knife to carve a mark on the side of the boat, saying: "Don't worry, my sword fell from here. When the boat docks, I can find it easily by following this mark."

Everyone was puzzled, but he confidently explained: "My sword fell at this fixed position. As long as I find this mark, I can easily retrieve my treasure."

After the boat docked, he dived into the water according to the mark, but failed to find the sword. Everyone shook their heads and sighed, while he could only stand there awkwardly.

Moral:

This story tells us that things are constantly changing and developing. We cannot stick to old ways of thinking when solving problems. If we only focus on past positions without considering changes in actual circumstances, we may end up going in the wrong direction or wasting our efforts in vain.