Quadratic
a. 二次的\\nn. 二次方程式
🗣️ 情景例句
What year were you born in?
你是哪一年生的？
I know the boy whose father is a scentist.
我知道那个男孩的父亲是科学家。
A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground.
一种叫“探宝器”的新机器已经发明出来，并被人们用来探测地下埋藏的金子。