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159页（245字）
比喻未能完成一件事就在半路上停下来，例他的那幅油画尚未完成，便又去画水彩，最后两样都半途而废，一事无成。
Having not quite finished the oil painting，he started on a water colour-both were left half-finished which brought him no satisfaction at all．