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211页（236字）
指做坏事的人费尽心机，却越来越无法得逞，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．For all his scheming， however，he failed and he became more and more desperate．