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257页（252字）
把以前的错误当做教训，使以后可以谨慎，不致重犯，例他出狱后便惩前毖后，踏实工作，因而再次得到亲友们的认同。
On leaving prison，he realized that he had done wrong in the past and must now work hard，thereby winning back the trust of his relatives and friends．