马隆向外看着毫无特色的灰绿色的景致。Malone looked out at the grey-green featureless landscape.她走到窗前向外看去。She went to the window and looked out.从前窗向外看得见一层厚厚的 、 软软的雪.From out the front windows one could see a deep, soft bedding....
Variational principles play an important role in the formulation of many problems of mathematical physics.变分原理现在许多数学物理的表述中起着重要作用.Bernardine: You're quite wrong there. It's a special formulation that's just...