标准美语发音的13个秘诀 CD 4 Track 26（在线收听）

Exercise 8-12: Nonverbal Intonation     CD 4 Track 26 

The top eight are the most common non-word communication sounds. They can all be nasalized or not, and said with the mouth open or closed. Intonation is the important factor here. Repeat after me.

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