1. Secondly, we contrasted their vowel system and mainly investigated the influence of different parts of the initial consonant pronunciation on the evolution of the vowel system. 其次，对比了《广韵》与《潮语十五音》韵母系统，并重点考察了不同发音部位的声母片韵母演变所产生的影响。
2. Different ways of complication or simplification from the five-vowel system might have resulted in the other types of vowel systems. 其他音系类型可能都是从五元音音系经历不同的过程演化而成的。
3. A cardinal vowel is a vowel sound produced when the tongue is in an extreme position, either front or back, high or low. 当舌头位于极端的位置，发出的元音就是定位元音，不论位置的前后或高低。
4. It is in accordance with the vowel letters, vowel combinations of letters, consonants and consonant-letter acronym in the open and closed syllable syllable pronunciation of the law of memory. 它就是按照元音字母、元音字母组合、辅音字母及辅音字母组合在开音节和闭音节的读音规律记忆。
5. 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。
