Unit 5 Back Vowels:/ɑ:/，/&594;/，/&596;:/，/&650;/，/u:/
基础科学

Unit 5 Back Vowels:/ɑ:/，/&594;/，/&596;:/，/&650;/，/u:/图片（共5张） :

        IntroductionIn forming the back vowels the back of the tongue is instrumental in giving thevowels their quality. The varying distance of the back of the tongue from the softpalate results in different back vowels. Going up the series toward /u:/, the mout......（本文共 18081 字, 5 张图）     [阅读本文] >>