全浊声母清化是汉语语音史上最重要的事实,以“三分变二分”不但可以区分官话和非官话,还可以把各种近江方言和远江方言区别开来。本文讨论了各种南方方言在全浊声母演变上的不同的类型和层次,最后发表了关于语音演变历史层次研究的一些感想。 Voiced-initials are the most important facts in the history of Chinese phonology. Using “one-third to two-part ” can not only distinguish between official and non-Mandarin, but also distinguish various kinds of Ogan and Yuanjiang dialects. This article discusses the different types and levels of various southern dialects in the evolution of voiced voiced voices, and finally published some thoughts on the historical level of phonetic evolution.