Green rs theorem

• 格林定理

Green rs theorem的用法和样例：

例句

1. Taking 3D Laplace equation as governing equation and applying to the second-order Green identity, an integration equation is founded in linear frequency-domain.
   论文首先以三维拉普拉斯方程作为基本控制方程，应用第二格林定理，建立线性频域内的积分方程。