现代北京话的音位系统问题是北京话语音研究和教学的核心内容之一,对于了解北京话的现状和历史有着直接的、重要的意义。而元音音位系统的确立又是北京话音位学研究的关键。自十九世纪七十年代现代音位学理论建立以来,特别是本世纪以来,北京话音位系统的研究也已有数十年的历史,对此国内外学者曾提出过多种方案,但迄未有一个相对公认的结论,在元音音位的研究上尤其意见分歧,一直未臻完善。我个人认为这与偏重于单元音的处 The phonetic system of modern Beijing dialect is one of the core contents of Beijing dialect research and teaching, which has direct and important significance for understanding the current situation and history of Beijing dialect. The establishment of the vowel phoneme system is the key to the study of phonetics in Beijing. Since the founding of the modern phonology in the 1870s, especially since the beginning of this century, the study of the phonetic system of Beijing has been for decades. To date, there have been many proposals by domestic and foreign scholars, but so far In the absence of a relatively generally accepted conclusion, especially in the study of vowel phonemes, differences of opinion have not been consummated. Personally, I think this is more of a unitary tone