知識(shí)貝殼
知識(shí)貝殼
所屬欄目：英語語音
Producing /f/1) Raise the soft palate so that no air can escape throughthe nasal cavity;2) Press the upper teeth against the lower lip lightly so thatthe air can be forced out between the teeth and the lower lip;3) Produce the sound by forcing air out thr ......（本文共 7161 字 , 2 張圖） [閱讀本文] >>