Diphthongized
vt. 使双重元音化；读作双元音\\nvi. 变为双元音
🗣️ 情景例句
We once found a cat.
我们有一次找到一只猫，
It's a shame these instructions are so complicated.
真遗憾，这些说明太复杂了。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。