出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第101页（244字）
比喻获得成功后就忘了赖以成功的事物，即忘恩或忘本，例人当知恩图报，若是得鱼忘筌，过河拆桥，将为世人所不齿。
One should be grateful to those who have helped one．If one is ungrateful and drops one’s benefactor，one will be held in contempt by society．