Quadratics
n. [数]二次方程式论
🗣️ 情景例句
Thank you. The same to you.
谢谢。圣诞快乐！
Work today, for you know not how much you may be hindered tomorrow.
今天有事今天做，明天可能事受阻。
Can his machine fly?
他的机器能飞吗？