curvature invariant

例句：

1. 1. The shape of the object is determined by its curvature invariants.
   物体的形状由其曲率不变量决定。
2. 2.In mathematics, the curvature invariant is a key concept for understanding the behavior of surfaces.
   在数学中，曲率不变量是理解曲面行为的关键概念。
3. 3.The curvature invariant can be used to calculate the bending moment of a beam.
   曲率不变量可以用来计算梁的弯曲矩。