止摄字的“枲”“徙”小韵不是出于避讳“死”的读音而发生的例外音变,而是一种规则音变,属于声韵调多种因素共同配合作用下的综合音变模式。除了舌尖化,中古精组止摄三等字还有一条声母腭化的音变道路,两条音变规则先后作用,导致同一韵部产生两种语音形式。 Catch the word “枲 ” “migration ” small rhyme is not out of taboo “death ” the pronunciation of the exception tone, but a regular tone, belonging to the rhyme tune a variety of factors co-ordination Under the action of the integrated sound change mode. In addition to lingualization, there is also a paralic acoustical parallax change path in the Middle Ages group Tripartite. The two phonetic rules work in succession, resulting in two phonetic forms of the same rhyme.