单词vowel system
na.: 母音系统
网络: 元音系统
母音系统
The vowel system of Dari differs from that of Farsi, and Dari also has additional consonants.
达里语的元音系统和波斯语不同，且达里语有附加的辅音。
As a relatively independent sound system, interlanguage vowel system has its own specific regulations.
中介语元音系统是一个相对独立的语音体系，它的建构次序存在其特有的内在规律。
Some Characteristics of the Vowel System for Chinese Character Pronunciation in the Korean Language
韩国汉字音韵母系统的几个特征
The Evolution of the Compound Vowel System of New Hangzhou Dialect
新杭州话韵母系统的演变