Quadratic
a. 二次的\\nn. 二次方程式
🗣️ 情景例句
Oh, what are you doing tomorrow?
噢， 明天你打算做什么？
How much is a call to the United states?
打一个电话到美国去需要多少钱？
The brain needs a continuous supply of blood.
大脑需要连续不断地供血。