Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
It'll all be over in two hours.
再两个小时就结束了。
I like to go to the movies when I feel in the mood for it.
我兴致高时喜欢看电影。
Mr. Smith knew Jack didn't look at the others because he was nervous.
史密斯先生知道杰克不敢看别人是因为紧张。