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(194字)
改变原来外形,使人不认识他,例每个国家都应严防他国乔装打扮的间谍与特务分子的渗透。
All countries have to guard against the infiltration of disguised spies and secret agents from abroad.