Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
my grandfather is
我爷爷
Why are you so busy?
你为什么这样忙碌？
There seems to be something wrong with it, but that's the fault of the company that made it.
这衬衣似乎有点问题，但看来这是衬衣公司的责任。