Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
So, how's work?
工作还顺利吗？
I'm going to show him how to write.
我正要指点他如何写字。
The day after, Patrick went to the house once more and asked exactly the same question.
第三天，帕特里克又去了，提出了同前两天完全一样的问题。