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1.又称介音。某些韵母的组成部分，是介于声母和韵腹之间的高元音。参见"韵母"。
[head vowel, any of the three vowels “i”,“u” and “ü”in certain compound vowels, as “i” in “iang”] 介音。是介于主要元音与声母之间的高元音
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