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168页（235字）
指做坏事的人费尽心机，但却无法得逞，处境一天不如一天，例他千方百计想离间我们，结果心劳日拙，枉费心思。
He did everything possible to break up our friendship，but for all his scheming，he failed．This made him become more and more desperate