unofficial visit
美
英 
例句
The motives behind North Korean leader Kim Jong-il's 'unofficial' visit to China last week may not be that hard to decipher.
上周,朝鮮領導人金正日對中國進行了“非正式”訪問,其目的也許并不難揣度。
The Great Leader Kim Jong Il Pays an Unofficial Visit to the People's Republic of China
偉大領導者金正日同志對中華人民共和國進行非正式訪問