Quadric
a. 二次的\\nn. 二次曲面
🗣️ 情景例句
As far as possible, the teacher should expose the student to real life situations.
教师应该尽可能使学生接触现实生活的情景。
I couldn't get through.
我打不通电话。
It's not like her to have missed two days of classes.
缺课两天不太象她的作风。