Conicoid
n. 二次曲面
🗣️ 情景例句
The costs of college get higher every year.
学费逐年增加，越来越贵。
Open your eyes!
眼睛放亮一点！
The telephone rings and this marks the prelude to an unforeseen series of catastrophes.
这时电话铃响了。它预示着一连串意想不到的灾难的来临。