Improper quadric
[计] 异常二次曲面
🧩 词语组成解析
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
Goodbye, hope to see you again.
再见， 希望再次见到你。
If I had known that, I could have helped you.
假如我早知道，我就能帮你了。
Don't cry over spilt milk.
不要做无益的后悔。