8.4 Palato-Alveolar Fricatives /&643;， &1248;/
基础科学

        Producing /&643;/1) Raise the soft palate to stop the air escapingthrough the nasal cavity;2) Protrude the lips slightly;3) Place the tip of the tongue near the lower teeth andraise the front part of the tongue toward the hard palate;4) Press the sides of......（本文共 7003 字, 2 张图）     [阅读本文] >>