phonology
/fəˈnɔlədʒɪ; fə`nɑlədʒɪ/ n[U]
(linguistics 语言)
1 study of the system of speech sounds, esp in a particular language 音位学, 音韵学, 音系学（尤指某语言的）
a course in phonology 音系学课程.
2 system of sounds in a particular language, esp at a particular pointin its development 语音体系（尤指历时的）
the phonologyof Old English 古英语语音体系.