The radiusvector of each solid is always a positive length.
每个立体的矢径总是正值长度。
2
Making use of the moment vector and radiusvector of rotation, the lateral buckling of thin-walled members are analyzed.
以弯矩矢量和转角向径为工具，分析了薄壁构件的弯扭屈曲。
3
With the help of the simple mathematical method, another transformation formula of coordinates and time between the radiusvector equations in inertial frames is derived in the paper.