例句與造句

1. in this paper, we consider a class of nonlinear elliptic equations . with the method of constraint variation, we obtain the existence of the solutions for the equations
   摘要本文考慮一類非線性橢圓方程。運(yùn)用強(qiáng)制變分方法，我們給出了在多種情況下方程解的存在性。
2. It's difficult to find constraint variation in a sentence. 用constraint variation造句挺難的