Conics
n. 锥线法, 锥线论
🗣️ 情景例句
Need another box?
需要另一个箱子吗？
It is better to be safe than sorry.
事后追悔不如事前稳妥。
No matter what the conditions were, he believed that a car should be driven as fast as it could possibly go.
他认为不管路面情况如何，车必须以最高速度前进。