To pronounce back vowels, speakers are supposed to raise the - 第一章元音 - 英语语音 - U校园

To pronounce back vowels, speakers are supposed to raise the back of their tongue the highest.

To pronounce back vowels, speakers are supposed to raise the - 第一章元音 - 英语语音 - U校园 | 大学网课搜题引擎