Second Difference

Subject	English	Chinese
tech.	average difference of second order	平均二级差
tech.	double second difference	倍程二次差
busin.	homogeneous second-order difference	齐次二阶定差方程
tech.	relative average difference of second order	相对平均二级差
stat.	second difference	二次差
busin.	second difference	二阶差分
busin.	second difference transformation	二阶差分变换
IT	second divided difference	二阶均差
polym.	second normal stress difference	第二法向应力差
phys.	second normal-stress difference	第二法向应力差
avia.	second-order central difference	二阶中心差分
tech.	second-order difference transformation	二阶差分变换