By putting the two together, out comes the elliptical motion of the planets.

将这两个式子联立,就得到了行星作椭圆运动的方程

耶鲁公开课 - 基础物理课程节选

Well, it was not very hard for me to draw this red blood cell here, it's just an oval, and one reason I draw it like an oval, is that that's basically what it looks like if you look at it.

我可以很容易的画出,一个血红细胞,就画个椭圆足矣,因为它看上去就是这个样子的

耶鲁公开课 - 生物医学工程探索课程节选

s plus 1s gives you this oval ellipsoid which is the bonding, and here are the antibonding, and then these are the energy levels that I have been drawing for you.

s和1s上两个电子组成的键合电子成椭圆形,这是成键，这是反键电子，这些是刚刚已经画过的能级,我也给你们画了。

麻省理工公开课 - 固态化学导论课程节选