丰满有漂亮
发表于 2025-3-28 17:27:05
http://reply.papertrans.cn/59/5868/586763/586763_41.png
表脸
发表于 2025-3-28 22:49:30
Vector Calculus,elves in the cylindrical and spherical coordinate systems. We defined differential quantities such as differential length vectors, differential area vectors, and differential volumes in different coordinate systems. We also learned how to transform the coordinates of a point or the components of a vector from one coordinate system to another.