Diphthongal
a. 二合元音的, 连字的
🗣️ 情景例句
Involve the entire family in a reading project.
让整个家庭都参与阅读计划。
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
Only very thrifty children manage to fill up a money box.
但是能把储蓄罐装满的只有屈指可数的几个特别节俭的孩子。