刻舟求剑

刻舟求剑 　　【范例】 请用英语解释一下“刻舟求剑”这个成语故事。故事大意为：楚国有一个人过江时，把剑掉在水里，他在船帮上剑落的地方刻上记号，等船停下，从刻记号的地方下水找剑，结果自然找不到。(字数要求70个左右。) 　　【参考】 　　A man of Chu State was once taking a boat across a river when he carelessly dropped his sword into the river. He made a mark on the side of the boat where he dropped the sword, hoping to find it again later on. When the boat reached the other side of the river, he got off and went into the water from where he made the mark, in search of the sword. Naturally he couldn't find it in the end.