Diphthongization
n. [语]二合双元音化,复元音化
🗣️ 情景例句
I would like to make a suggestion.
我想提个建议。
Oh! That's all right.
哦，不要紧。
Alpine village tended to be impoverished settlements cut off from civilization by the high mountains.
阿尔卑斯山山区的小村几乎全是高山环抱、与世隔绝的穷乡僻壤。