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163页（232字）
指做坏事的人费尽心机．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，枉费心机。
He did everything possible to break up our friendship．For all his scheming，however，he failed and he became more and more desperate．