noun 下载 🔗分享 二次式,二次方程。 A quadratic polynomial, function or equation. Examples : "In algebra class, we are learning about quadratics and how to solve for their roots. " 在代数课上,我们正在学习二次方程,以及如何求它们的根。 math number 与AI对话词汇游戏阅读练习