Derivator
[计] 微分器
🗣️ 情景例句
Guess what I just found out.
你猜我刚知道了什么？
I used to be a pilot. Now, I'm a parachutist.
我曾经做过飞行员，如今是伞兵了。
The people in the shop are very friendly.
商店里的人很友好。