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
Here are ten letters that express my feelings for you.
这里有十个字母可以表达我对你的感情。
Hi, Lucy. I'll take French and Economics.
你好，露西，我想选法语和经济。
Don't crowd round him, said the gate keeper.
“不要围着他，”学校门卫说。