线性椭圆型方程 elliptic linear equation: 线性椭圆方程elliptic equation: 椭圆方程; 椭圆时差; 椭圆型方程; 椭圆型微分方程elliptic difference equation: 椭圆差分方程; 椭圆型差分方程elliptic differential equation: 椭圆微分方程; 椭圆型微分方程elliptic nonlinear equation: 非线性椭圆方程下载手机词典可随时随地查词查翻译