"三字是同一音義,分別為口語,書面語和物主義代詞的三種不同書寫形式和讀音."
http://big5.xinhuanet.com/gate/big5/www.fj.xinhuanet.com/zhkjw/2008-03/18/content_12729302.htm
http://big5.xinhuanet.com/gate/big5/www.fj.xinhuanet.com/zhkjw/2008-03/18/content_12729302.htm