quadratic mix二次拌和quadraticadj.二次的n.二次方程式；二次方程式论quadratic confidence limit二次置信界限quadratic null constraints二阶零点quadratic Euclidean domain二次欧几里得整环quadratic residue sequence二次剩余序列quadratic polynomial model二次多项式模型quadratic utility function二次效用函数quadratic imaginary fields虚二次域quadratic differential form二次微分形式Quadratic Regression Design回归正交设计quadratic residue algorithm二次剩余算法