Utilizing the theory of phonetics and historicalphonology, the thesis discusses the cause of the sound changes and the diversities.
第三，本文结合语音学和历史音韵学理论，讨论了导致语音变化和内部差异产生的原因。
2
But now the "rhyme with tone" and "rhyme" of Chinese historicalphonology don "t accord with this demand." Therefore this phenomenon adds difficulty to the learning and academic study in this field.
目前汉语音韵学的“韵”和“韵部”不符合这一要求，给学习和研究增加困难。
3
Studies on historical phonetic change of Chinese is traditionally called Chinese phonology in China.