Every vector can be resolved into covariant or into contravariant components.每个矢量都可以分解成协变分量或逆变分量.The covariant equation of plane motion body in curved space - time is studied.研究弯曲 时空 中平面运动刚体的动力学协变方程.This decomposition ma...
那书脊是烫金的.The spine is tooled in gold.这本书的书脊很漂亮,很吸引人.The spine of the book is very beautiful and attractive.圆脊机: 把书脊做成凸起圆弧的机器.Back rounding machine: Machine for rounding the back of a book....
Farmers scattered up and down the creeks and rivers, with great distances between families.农民四处散居于溪涧河流上下各处, 一家一家之间隔得很远.The prospect lies between two creeks.矿区位于两条溪流之间.Lonely creeks are opal in the dawn, sword - blue in t...