In this sentence, the vowel sound become reduced to a central vowel.
此句中这个元音弱化为中元音。
Some English vowel sounds which are not given weight in speech become reduced to a rather formless central vowel.
英语中有些元音在讲话时没有重读，结果成了相当不定型的中央元音了。
Most English vowel sounds which are not given weight in speech become reduced to a rather formless central vowel.
在言语中不重读的英语元音大部分被弱化成无形的中元音。
Most English vowel sounds which are not given weight in speech become reduced to a rather formless central vowel.
在言语中不重读的英语元音大部分被弱化成无形的中元音。
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