当前通行的等韵体系中开合口的来源考论

A Textual Research of the Origin of Round-and Spread-lip Sounds in the Current Chinese Prosodic System of Dengyun

当前通行的等韵体系中,开合口的术语系统并非直接来自《韵镜》之类的早期韵图,而是以比较晚近的韵图为依据的。用反映宋元甚至明清时期语音实际的术语描述中古前期的《切韵》音系,要注意时代的差异。

In the current Chinese prosodic system of Dengyun, the terminologies of roundlip （kaikou） and spreadlip （hekou） do not originate from the Chinese early prosody map such as Yunjin but from the lately rhyme map. We should pay attention to the temporally related differences when we use these terminologies to discuss ancient Chinese sound systems.