Derivator
[计] 微分器
🗣️ 情景例句
I ventured to correct the teacher's mistake.
我鼓起勇气去纠正老师的错误。
Knowledge advances by steps not by leaps.
知识的获得是循序渐进而不是突飞猛进的。
Yes. There are two.
是的，有两个。