《廣韻》一書有233處字下又音,在正切另處没有相應的收字。除去很小一部分是文獻校勘錯誤造成的假性又音外,其他多有文獻來源,並非編修者隨意增加。有些正切不收字是因爲又音透露起因於漢字分化或用字問是的形音關係,有些是因爲編修者於字音有所取捨,正切處有意不收。 “Guangyun” a book has 233 words under the sound, there is no corresponding word in the tangential elsewhere. Apart from a small part of the literature, there is a great deal of false sources caused by collation mistakes. There are many other sources of literature, not editors who increase arbitrarily. Some do not accept the word because the tone is also due to the differentiation of Chinese characters or the word is the relationship between the phonetic, and some because of the editors have the choice of phonetic, tangential deliberately do not accept.