n.椭圆面，椭球面，椭圆体，椭球（体），椭球状（动物粪粒）

The ellipsoid is a mathematical model that represents the shape of the Earth.
椭球体是一个代表地球形状的数学模型。
In geometry, an ellipsoid is a type of quadric surface.
在几何学中，椭球体是一种二次曲面。
The ellipsoid has three axes of symmetry.
椭球体有三个对称轴。
A perfect example of an ellipsoid is a rugby ball.
完美的椭球体例子是橄榄球。
The gravitational field of a planet can be approximated by an ellipsoid.
行星的引力场可以用椭球体近似。
An ellipsoid can be formed by rotating an ellipse about one of its axes.
通过围绕其一个轴旋转椭圆，可以形成一个椭球体。
The Earth's shape is often described as an oblate spheroid, which is a type of ellipsoid.
地球的形状通常被描述为扁球体，这是一种椭球体。
Many natural phenomena can be modeled using ellipsoids, such as the shape of planets and moons.
许多自然现象可以用椭球体来建模，比如行星和卫星的形状。
The volume of an ellipsoid can be calculated using the formula V = (4/3)πabc.
计算椭球体体积的公式是V=(4/3)πabc。
The ellipsoid has many practical applications in engineering, physics, and mathematics.
椭球体在工程、物理和数学中有许多实际应用。