second-order calculation 二级近似计算

various order calculation 变阶次计算

Calculation Order 计算顺序

First-order Difference Calculation 一阶微分运算

Order quantity calculation 采购数量的确定与计算方法

recursive high order derivative calculation 高阶导数递推

calculation order-of-magnitude 数量级计算

order-changing calculation 换序计算

order of magnitude calculation 数量级计算