hyperboloid of two sheets

例句：

1. 1. The hyperboloid of two sheets is a mathematical object that describes the shape of an ellipse when viewed from above.
   双叶双曲面是描述椭圆从上方观看时形状的数学对象。
2. 2. In astronomy, the hyperboloid of two sheets is used to describe the shape of the solarsystem's orbits around the sun.
   在天文学中，双叶双曲面用于描述太阳系围绕太阳的轨道形状。
3. 3. The hyperboloid of two sheets is also used in physics to explain the behavior of objects under gravity.
   双叶双曲面也在物理学中被用来解释物体在重力作用下的行为。