Precalculus
a. & n.学习微积分前必修的(课程)
🗣️ 情景例句
You get one point for each letter,
一个字母可得一分。
Again? ...Still?
又来
It's often cold in December, January and February.It snows sometimes.
12月、1月和2月常常很冷，有时还下雪。