Diphthongisation
n. 双元音化
🗣️ 情景例句
You've been very thoughtful.
你一直都很周到。
Every why has a wherefore.
事出有因。
The tent was full of water! They all leapt out of their sleeping bags and hurried outside.
原来帐篷里到处都是水！他们全都跳出睡袋，跑到外面。