知识贝壳
知识贝壳
所属栏目：英语语音
Producing /m/1) Close the lips to stop the air stream in the mouth;2) Lower the soft palate so that the air can escapethrough the nasal cavity;3) Vibrate the vocal folds as the air comes out of the nose;4) The lip position will depend upon that of adjacen ......（本文共 2218 字 , 1 张图） [阅读本文] >>