Differentiating
[计] 微分的
🗣️ 情景例句
Except for the beard, he hasn't changed in fifty years.
除了有胡须， 他五十年来没有变。
You have no goats,and yet you sell kids.
没有老山羊，还把小羊卖。
I am very well. Did you have a good summer holiday?
我很好。你暑假过得好吗？