base vectors

例句：

1. 1. In computer graphics, base vectors are used to define the shape of objects in a 3Dscene.
   在计算机图形中，基础向量用于定义3D场景中物体的形状。
2. 2. The algorithm uses base vectors to calculate the distance between two points on the surface of the earth.
   该算法使用基础向量来计算地球表面上两点之间的距离。
3. 3. The software provides tools for manipulating base vectors and modifying their properties.
   该软件提供了操纵基础向量和修改其属性的工具。