In this paper, unit moving trihedron is first constructed for a point on the surface of a revolution ellipsoid.
以旋转椭球体面上某点为原点建立一个大地坐标单位活动坐标架。The interrelation between the signs of the birefringence in the planes of symmetry can be deduced from the index ellipsoid .
各对称面的双折射符号之间的相互关系，可以从标准椭球体推定。It is found that the form of the sandstorm particles is various, including spherical, elongated, and cloddy particles in the samples.
结果发现，沙尘暴颗粒物的形态各异，有球形的、椭球的、长条形的以及疏松块状结构。These GPS ellipsoidal heights are not consistent with leveled heights above mean sea level, often known as optometric height.
这些GPS椭球面高度不符合上述海平面高度被夷为平地，经常被称为视力测定高度。The ellipsoidal curved surface of each semiellipsoid is adjacent to the junction surface and the bottom surface.
各半椭球体有椭球曲面邻接接合面和底面。In this paper, a double-ellipsoid heat source model was used for simulating the welding heat source of bogie frame.
采用双椭球热源模型，对转向架构架焊接过程中所涉及热源进行仿真计算，并通过试验验证了结果准确性。A projection is defined as any orderly system whereby the meridians and parallels of the spheroid may be represented on a plane .
投影是一种有规律的方法，用来把椭球面上的子午圈和平行圈映射在一个平面上。Conclusions: The proposed less computationally intensive method may be used to precisely calculate the diffusion ellipsoidal surface area.
结论：本文所提方法计算量较小，可以精确地计算扩散椭球表面积。It looked like a sphere but on closer examination I saw it was really a spheroid.
它看起来是圆形，但仔细观察后发现它实际上是回转椭球体。