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115页（209字）
形容能坚持，不间断，例张三对妻子的体贴关怀，几十年来始终如一。
They have been married a long time and apart from his devotion，Zhang San has never failed to give his wife all the care he can．