Derivator
[计] 微分器
🗣️ 情景例句
Now you understand my feelings, Susan.
现在，你能理解我的感受了， Susan。
One cannot always be a hero, but one can always be a man.
人难一世称雄，但可一生为人。
Shopping, too, is always a pleasure.
买东西也是一种乐趣。