狭义的方言学指的是对地域性语言差异的研究，又称为方言地理学。

The narrow sense refers to the dialect of the regional differences of language, also known as the dialect geography.

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音乐的音调在一定程度上受语音声调制约，三峡库区地域性的民歌与当地方言语音声调的联系不可忽视。

For the pitches of music are partly restricted by tones of a language, one cannot neglect the relation between the regional folksongs of the Three Gorges tone and its dialectal tones.

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