Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
My, what a downpour! And there doesn't seem to be any sign of its stopping.
哎呀，好大的雨呀！没有一点像要停的样子。
An nod is as good as a wink to a blind horse.
对牛弹琴。
Quality is even more important than quantity.
质量比数量更为重要。