radius vector

• n. [天]矢径；[数] 向量径

英英释义

Noun:

1. a line connecting a satellite to the center of the body around which it is rotating

2. a line connecting a point in space to the origin of a polar coordinate system

例句

用作名词 (n.)

1. The radius vector of each solid is always a positive length.
   每个立体的矢径总是正值长度。