Ray equation is derived from Fermat's principle in variationform.
本文由费马原理的变分形式,导出光线微分方程。
2
And there was no clear-cut correlations between the variationform and the sequence mode.
而且,这种变化形态与地震序列类型无明显的关系。
3
Eyes and feet have been optimized to function on our planet, so perhaps some variation will be found attached to a life form thriving on a distant world.