contravariant vector

例句：

1. 1.In the context of linear algebra, a contravariant vector is a vector that points in the opposite direction to the direction of a basis vector.
   在线性代数中，一个反变向量是指向基向量方向相反的向量。
2. 2. The study of contravariant vectors is crucial for understanding the properties of materials under different stress conditions.
   研究反变向量对于理解不同应力条件下材料的性质至关重要。
3. 3. In computer graphics, a contravariant vector is used to represent the direction of an object's normal vector.
   在计算机图形学中，反变向量用于表示对象法线向量的方向。