双元音的英文：
[Phonetics] a diphthong

参考例句：

To pronounce as or become a diphthong.
使双元音化如发双元音那样发音

A diphthong is considered one vowel sound.
双元音被看做是一个元音。

All vowel and diphthong sounds in English are voiced.
所有英语元音和双元音都是发声的。

The change of a simple vowel to a diphthong,often caused by the influence of neighboring consonants.
元音割裂一个单元音向一个双元音的转变，常由临近辅音影响所致。

phonetics是什么意思：
adj. 表示语音的；音形一致的；语音的，语音学的

Allophone is a phonetic variant of a phoneme.
音位变体就是音位的语音变异。

Is the text marked with phonetic symbols?
课文有注音吗？

Russian spelling is phonetic.
俄语的拼法是音形一致的。

Allophone is a phonetic variant of a phoneme.
音位变体就是音位的语音变异。

Phonetic symbols,alphabet,transcription
音标、语音字母、标音.

diphthong是什么意思：
n. 双元音

A diphthong is considered one vowel sound.
双元音被看做是一个元音。

All vowel and diphthong sounds in English are voiced.
所有英语元音和双元音都是发声的。

Either of two marks used in Greek to indicate aspiration of an initial vowel or diphthong (') or the absence of such aspiration (?).
希腊语中两种符号之一,表示首元音或双元音的送气发音的符号(')或不发这种送气音的符号(?)。

Either of two marks used in Greek to indicate aspiration of an initial vowel or diphthong(')or the absence of such aspiration(?.
送气符号，送气音希腊语中两种符号之一，表示首元音或双元音的送气发音的符号(＇)或不发这种送气音的符号()