IDOE

例句：

1. 1. I don't know what happened to him.
   我不知道他发生了什么。
2. 2. IDOE is a new word that has not been defined yet.
   IDOE是一个尚未定义的新词。
3. 3. The teacher asked us to IDOE the problem before class.
   老师要求我们在课前解决这个难题。