Diphthongizing
vt. 使双重元音化；读作双元音\\nvi. 变为双元音
🗣️ 情景例句
Thanks, Ellen.
谢谢， Ellen。
After Flagstaff, we'll go to San Diego.
到佛拉格斯塔夫之后，我们去圣迭戈吧。
One evening, however, the lamb was missing.
可是，一天晚上，那只小羔羊失踪了。