second-order difference

• 二次差分

second-order difference的用法和样例：

例句

1. Results The general expressions of equal-power high-power nonlinear difference squeezing in the multimode state light field with any amount of states superposing was given.
   结果给出了任意多态叠加多模叠加态光场的广义非线性等幂次高次差压缩的一般表达式。