Cauchy's quadric

例句：

1. 1.The Cauchy's quadric is a mathematical concept that plays a crucial role in the study of fluid flow.
   卡西的四次方是数学概念，在流体流动研究中起着至关重要的作用。
2. 2.In this model, the Cauchy's quadric is used to describe the shape of the fluid domain.
   在这个模型中，卡西的四次方被用来描述流体域的形状。
3. 3. The Cauchy's quadric is also used to calculate the stress and strain in engineering applications.
   卡西的四次方还用于计算工程应用中的应力和应变。