1.
To change(a vowel) by umlaut.
变换元音通过元音变化改变（一个元音）
2.
LiangSegmental Sound Change and Its Phonetic Context;
语音音段音变现象与语音语境之关联
3.
the strong conjugation
强变化((由母音变化而成))
4.
A boy's voice cracks (ie becomes deeper) at puberty.
男孩在青春期嗓音改变（声音变粗）.
5.
The change, especially an umlaut, that is caused in a sound by its assimilation to another sound.
元音变化，变音由于一个音被另一个音词化而导致的变化，尤其是元音的变化
6.
the conversion of a simple stop consonant into an affricate.
从一个简单的阻塞音变成一个塞擦音。
7.
On Glottal Stop Change in Pronunciation of Chinese Words in Japanese;
日语汉语词汇读音中的促音变化研究
8.
Phonological Change and Word Formation by Onyomi-Kanji in Japanese;
语音变化对日语音读汉字构词的影响
9.
Study on the influence of English speech sound changes on listening comprehension;
浅析英语语音音变对听力理解的影响
10.
chromatic semitone
变化半音, 花半音
11.
To change(a consonant)into a vowel during articulation.
使发成元音在发音中变（辅音）为元音
12.
A vowel sound changed in this manner.
变元音由这种方式改变的元音发音
13.
To pronounce as or alter to a palatal sound.
发成颚音或变成颚音
14.
(music) brought to correct pitch.
（音乐）使音调变得正确。
15.
To change or vary the pitch, intensity, or tone of(one's voice or a musical instrument, for example).
调整，改变音量改变或变换如嗓音或音乐装置的音高，强度，或音调
16.
(of the voice) not inflected.
（指声音）没有变调。
17.
Alteration in pitch or tone of the voice.
音调的调整在音调和音高上的变化
18.
A change in stress, pitch, loudness, or tone of the voice; an inflection of the voice.
变音在语调、音高、音量或音调上的变化；声音的一种转调