复数： diphthongs

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Also , all vowel and diphthong sounds in english are voiced .

同样地，所有英语元音和双元音都是发声的。

However , in the standard pronunciation of modern english this vowel is not a diphthong ; therefore , its history can be left for the future .

然而在现代英语的标准发音中，该元音不是一个双元音，因此，它的历史要留待未来的研究了。

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。

A diphthong is two vowel sounds pronounced one after the other within the same syllable .

双元音是两个元音合二为一的音，在同一个音节中一个接一个地发音。