【目录】 Part One English Pronunciation and Supetructural Features Unit 1 Front Vowels Central Vowels English Syllables Unit 2 Back Vowels Word Stress Unit 3 Closing Diphthongs Sentence Stress Unit 4 Centralized Diphthongs Weak Form Unit 5 Ploslon Loss of P]osion or Incomplete Plosion Unit 6 Fricatives Coonant Cluste Unit 7 Fricatives English Liaison/Linking Unit 8 Affricates Assimilation Unit 9 Nasals Falling Tone Unit 10 Laterals Rising Tone and Rising-falling Tone Unit 11 Semivowels English Rhythms Unit 12 See Group and Pausing American Pronunciation Part Two Imitation and Practice Unit 1 Short Passages Unti 2 Famous Speeches Unit 3 VOA &BBC References