The historical evolution of the initial dental consonants since mediaeval times 中古以来齿音声母的历史演变
2.
The evolution of the opening and closing of dental sound of mediaeval times in modern times 中古齿音开合口在现代的演变
3.
The evolution of the opening and closing mouth of dental sound of mediaeval times in recent times 中古齿音开合口在近代的演变
4.
The evolution of the opening and closing mouth of dental sound of mediaeval times during ming - qing dynasty 中古齿音开合口在明清时期的演变
5.
Map 2 shows the distribution of the consonant systems corresponding to the mc distinctions . a plausible scenario of the change is proposed by an analysis of the distribution of the relevant phonological features 第２图反映“等位” 、 “内外”等的音韵条件在“舌齿音二三等”声母读音上的表现，是历史音韵地图。
