7.1 Bilabial Plosives /p，b/
基礎(chǔ)科學(xué)

7.1 Bilabial Plosives /p，b/圖片（共2張） :

        Producing /p/1) Press your lips together firmly,to stop the flow of air;2) Hold the air behind the closure;3) Open the lips suddenly so that the air comes outof the mouth with a plosive sound;4) Before the lips are opened,the tongue takes theposition of t......（本文共 8566 字, 2 張圖）     [閱讀本文] >>