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Acoustic phonetics：
It studies the speech sounds by looking at the sound waves. It studies the physical means by which speech sounds are transmitted through the air from one person to another.
Affix:
Affixes are of two types: inflectional and derivational. Inflectional affixes manifest various grammatical relations or grammatical categories, while derivational affixes are added to an existing form to create a word.
Allophone：
The different phones which can represent a phoneme in different phonet ...
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