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229页（220字）
指处于最有利的地位，绝不致被击败，例他访问美国之后声望大增，下次竞选定将立于不败之地。
His prestige rose after he returned from America and this will make his position invincible when he runs in the next election，