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188页（245字）
比喻表面的改动，实质上还是和原来一样，例该国的新宪法实质上和旧宪法并无区别，不过改头换面而已。
There is actually no difference between that country’s new constitution and that of the old-its appearance has changed but the essence is the same．