At present, the researches focus on the study of the relationship between phonological changes and climate change.
目前对物候学的研究方向主要集中在探讨物候与气候变化之间的关系。
This paper puts forward the following viewpoints: 1. Phonological change is also a continuum in the continuum of semantic bleaching;
本文认为：1、在语法化的实词虚化连续统中，音系变化也是连续统；
The essence of the tone modification is a phonological opposition, and the vowel change is just an attachable phonetic phenomenon.
②通过对比分析，说明变调是这一特殊音变形式的实质与音位标志，韵母的音变只是小称变调所引起的附加语音变化。
This paper investigates tone change induced by er-suffixation, showing that tones behave differently with respect to different types of morpho-phonological processes.
本文着重考察晋语诸方言的儿尾变调与儿化变调，分析这两种变调所遵循的不同音系规则。
This paper investigates tone change induced by er-suffixation, showing that tones behave differently with respect to different types of morpho-phonological processes.
本文着重考察晋语诸方言的儿尾变调与儿化变调，分析这两种变调所遵循的不同音系规则。
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