Codifferential
上微分
??? 情景例句
Um, I was thinking of going to a movie tonight. Would you like to come?
我今晚想去看電影，你愿意一起去嗎？
My brother took lessons on the trumpet for nearly ten years.
我的兄弟有將近10年的時間聽小號的課了。
Thank you very much, sir.
多謝，先生。