王力(1982)和邵荣芬(1992)都认为《经典释文》中的支、脂、之三韵系已经相混,但李荣(1961—1962)和周祖谟(1982)从当时的押韵材料证明这三韵系并没有全部相混。本文对《释文》音切中涉及三个韵系的反切作了统计。通常认为《释文》的首音反映的是陆德明所认为的标准音。另外,本文认为首音中的直音或标有姓氏之音都不是陆德明心目中的标准音,所以在 Both Wang Li (1982) and Shao Rong-fen (1992) argue that the three rhyme systems of branch and fat in the Classic Interpretation have been mixed, but Li Rong (1961-1962) and Zhou Zu-mo (1982) Three rhyme system and not all mixed. This article makes statistics on the anti-cuts involved in the three rhyming lines in the tone cut of “Shi Wen”. It is generally accepted that the first sound of the “interpretation” reflects what Lu Deming considered as the standard sound. In addition, this article thinks that the first sound in the direct sound or the sound of the surname is not Lu Deming's mind standard sound, so in