1.
The duration of a vowel.
音延，音长元音发音的持续时间
2.
Pay attention to the drills in the English vowel sounds.
注意英语元音发音练习。
3.
A vowel sound changed in this manner.
变元音由这种方式改变的元音发音
4.
Investigating on Vowel's Overall Character of Human Languages Based on Comparing Sounds of Nature Language with IPA Pronunciation
自然语音与国际音标元音发音比较分析
5.
a letter of the alphabet standing for a spoken vowel.
字母表里代表元音发音的字母。
6.
A Report on Experiment about Hearing Impaired Children s Pronunciation of Combination Vowels;
听力障碍儿童复合元音发音实验研究
7.
To change(a consonant)into a vowel during articulation.
使发成元音在发音中变（辅音）为元音
8.
utter with vibrating vocal chords.
用振动的元音腱来发音。
9.
Note the use of the vowel sound in should and must when they are pronounced quickly.
注意should和must中快速发音时元音的发音。
10.
a diacritical mark (-) placed above a vowel to indicate a long sound.
放在元音上表示发长音的发音符号（-）。
11.
a diacritical mark (u-curved) placed over a vowel to indicate a short sound.
放在元音上标示短音的发音符号（u形）。
12.
The relative amount of time needed to pronounce a vowel, consonant, or syllable.
音量发出某元音、辅音或音节所需时间的相对量
13.
Occurring between vowels.
元音间的发生于元音之间的
14.
A single vowel articulated without change in quality throughout the course of a syllable, as the vowel of English bed.
单元音在一个音节的发音过程中不改变音质的单元音,如英文单词bed中的元音
15.
Comparison to Vowels in English and Mongolian Language and Their Connection with Consonants;
英语与蒙古语中元音的对比以及元音和辅音之间的发音关系
16.
of vowels) pronounced with the tongue raised close to the roof of the mouth
（指元音）闭塞音的（发音时将舌抬起接近上）
17.
Pronounced with both nasal and oral passages open.
鼻音化元音的发音时鼻腔和口腔同时张开的
18.
Phonetic Analysis of Tianjin Students Mispronunciation of English Vowel [e]、[(?)] and [ai];
天津学生英语元音[e]、[（？）]和[ai]发音错误的语音分析