本文以湖南省永州市冷水滩区的官话（即零陵话）以及被它所包围的“方言岛”&岚角山镇的土话为研究对象。
The thesis focuses on the Lingling dialects and the local dialects of Lanjiaoshan town known as " island of dialects " because it is surrounded by Lingling dialects .
冷水滩区