Precalculus
a. & n.学习微积分前必修的(课程)
🗣️ 情景例句
There's only one problem.
只有一个问题。
Will you iron out the wrinkles in this skirt?
可以帮我把这件裙子烫平吗？
Fifteen policemen had to push very hard to get him off the main street.
15个警察不得不用很大的力气把它推离主要街道。