Diphthongizing
vt. 使双重元音化；读作双元音\\nvi. 变为双元音
🗣️ 情景例句
There are abundant free materials available on the internet.
因特网上有丰富的免费资料提供。
We used to go to the movies about once a week.
我们过去常一个星期大约去看一次电影。
The stream wound its way across the field and then flowed right under their tent!
那小溪弯弯曲曲穿过田野，然后正好从他们的帐篷底下流过去。