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The first recognizable sounds are described as c_____, with velar consonants such as /k/ and high vowels such as /u/usually present.
The first recognizable sounds are described as c_____, with velar consonants such as /k/ and high vowels such as /u/usually present.
cooing
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当在其自由端B处作用一集中力偶M时，B端的转角大小为