目的：初步掌握健康儿童和腭裂术前患者汉语普通话语音中不送气辅音的声学特征。
Objective To explore the spectro-mode features of unaspirated consonants of Chinese Putonghua produced by healthy, normal children and children with cleft palate.
而在蒙古语中，送气与不送气、清与浊、软与硬都是重要的区别性特征；
Aspiration is the main distinctive feature of consonants in Chinese, whereas voicing and palatalization as well as aspiration are all distinctive in Mongolian.
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