Derivator
[计] 微分器
🗣️ 情景例句
and I stayed out an extra half hour.
我还特别多待了半个小时。
You'll fall, if you don't take care.
你不专心的话，就会跌倒。
She stamped out the letters 'SOS' in the snow.
她在雪地上踩出了“SOS”这3个字母。