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
Has he made it up with her yet?
他和她和好了吗？
Just a short line to say thanks.
只言片语聊表谢意。
I stopped to let the car cool off and to study the map.
我停下车，让汽车发动机冷却一下，同时查看一下地图。