Precalculus
a. & n.学习微积分前必修的(课程)
🗣️ 情景例句
I do some work for Smith and Dale,Your company's accounting firm.
我为贵公司的会计顾问公司 Smith和Dale事务所里做一些工作。
Riches do not always bring happiness.
富未必永远带幸福。
I often fish for hours without catching anything.
我经常一钓数小时却一无所获，