标准美语发音的13个秘诀 CD 4 Track 15（在线收听）

Exercise 8-1 : Comparing [u] and [ü]    CD 4 Track 15 

Look at the chart that follows and repeat eachword. We are contrasting the sound [u] (first column)—a strong, nonreducible sound, ooh, that is made far forward in the mouth, with the lips fully rounded—with the reduced [ü] sound in the second and fourth columns.

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