Tetraphthong
四合元音
🗣️ 情景例句
I know how you feel, but there's no need to go on and on about it.
我知道你的感受，可是也没必要这样没完没了。
When the wolf grows old, the crows ride him.
狼老被鸦欺。
Good.we can't extend the deadline.
那好，我们可不能延期的。