ellipsoidal bound

例句：

1. 1. The ellipsoidal boundary is a complex shape that can be difficult to visualize.
   椭球体边界是一个复杂的形状，很难可视化。
2. 2.The ellipsoidal boundary is the outermost boundary of an object that is not spherical.
   椭球体边界是物体最外层不呈球形的边界。
3. 3.The ellipsoidal boundary is used to define the limits of an object's volume and shape.
   椭球体边界用于定义物体体积和形状的限制。