Precalculus
a. & n.学习微积分前必修的(课程)
🗣️ 情景例句
Harry, if Michelle doesn't want to go,
Harry如果Michelle不想去，
If not, our repairman can come to you.
要不然，我们的维修人员可以上你那里去。
Where do the twins sit?
双胞胎坐在哪里？