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centering diphthongs,diphthongs

vowels, diphthongs and triphthongs
vowels, diphthongs and triphthongs基础英语语音ppt
基础英语语音ppt48 phonetic symbols vowel sounds diphthongs consonants voiceless
48 phonetic symbols vowel sounds diphthongs consonants voicelesscategories: monophthongs or pure/single vowels 单元音 diphthongs
categories: monophthongs or pure/single vowels 单元音 diphthongsvowels: diphthongs unit 7.
vowels: diphthongs unit 7.
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