Conicoid
n. 二次曲面
🗣️ 情景例句
By the way,
顺便问一声，
I don't buy it.
我才不信邪。
After they carved the characters on rocks, they put a piece of wet paper on top of the characters and beat it lightly.
他们把字刻在石块上后，再把一张潮湿的纸放在字的上面，并轻轻地拍打。