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226页（225字）
外面包围，里面接应，里外夹攻，例城外大军包围，城内揭竿而起，里应外合．一举攻占了整个县城。
While the town was surrounded，forces within and without collaborated so well that they were able to storm the town and retake it．