例句與造句

1. A variational formula combining mixed finite element method with discontinuous finite element method is derived for solving the two - group neutron diffusion equation in 2d
   摘要構(gòu)造了求解二維兩群中子擴(kuò)散方程的混合間斷有限元格式，研制了相應(yīng)的計(jì)算程序。
2. It's difficult to find variational formula in a sentence. 用variational formula造句挺難的