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285页（282字）
比喻人不经教育，不能成才，例玉不琢，不成器，这孩子天资虽高，但如果没有良师指导，恐怕成就不大。
Though this youngster is brilliant，yet he needs a good teacher to get anywhere．Remember，even a piece of jade needs cutting and polishing before it can be made into something beautiful．