所有英语元音和双元音都是发声的。
是双元音，故不能分开。
英语中有一些双元音。
有些可以表示双元音的符号看作是一种缩写。
Some of these signs can be considered "short-hands" in that they represent dipthongs.
发双元音时，从一个元音滑向另一个元音。例如。
In articulating a Diphthong, the vowel-sound glides from one vowel to another, such as.
双元音与词尾辅音类似，有时需要表示出来，有时则被省略。
Dipthongs are similar to ending consonants in that sometimes they are written and sometimes omitted.
这是系统性的变化，重读音节的6个元音和双元音都发生了变化。
This was a systematic shifting of half a dozen vowels and diphthongs in stressed syllables.
发音与语调：英语发音与语调练习题，音标，双元音，单词重音测试题等…
Pronunciation and intonation: English pronunciation and intonation exercises, phonetics, diphthongs, word stress quizzes, and more…
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 (?).
相似音并没有对PTHS生成的英语双元音的时长比例产生显著影响，PTHS体现出了自己特有的时长特点。
The duration radio of each is influenced neither by English nor Chinese diphthongs. The duration pattern of each English diphthong produced by PTHS shows a unique characteristic.
相似音并没有对PTHS生成的英语双元音的时长比例产生显著影响，PTHS体现出了自己特有的时长特点。
The duration radio of each is influenced neither by English nor Chinese diphthongs. The duration pattern of each English diphthong produced by PTHS shows a unique characteristic.
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