Diphthongia
n. [医]复音,双音
🗣️ 情景例句
Rotten weather, isn't it?
天气糟透了， 不是吗？
He is pinned down by the demonstrators.
他被示威的队伍给钉住了。
I had a letter from my sister yesterday.
昨天我收到了姐姐的一封信，