Two points determine a great circle on a sphere, so for any two points, cut the orange into half.
球面上的两点确定一条圆弧，因此任意两点可将橙子切成两块。
Let's say that I gave you a sphere of radius a centered at the origin, or maybe just half of that sphere or some portion of it.
已知以原点为心，以a为半径的球面，也可以说是半球面或是球面的一部分。
I could choose, for example, s1 a half sphere if I want or I can choose, let's call that s1, s2 I don't know, a pointy thing, s2.
比如说，我可以选择，一个半球面，或者我可以选一个…，先叫它，诶…，一个尖的曲面。
Women without men and men without women are incomplete half sphere, make two and a half sphere rolling forward happily "together"? Learn the art of husband and wife get along with.
没有男人的女人与没有女人的男人都是不完整的半个球体，使两个半球体“合二为一”快乐地向前滚动吗?那就要学会夫妻相处的艺术。
This is significant because of the unique geometrical features of the Arecibo telescope: whereas most radio dishes are parabolic in shape, the Arecibo dish is a giant half-sphere dug into the ground.
这非常重要，由于阿雷西博望远镜的独特几何结构：尽管绝大多数的射电望远碟面都是抛物面型的，而阿雷西博的碟面是在地上挖出的一个巨大半球。
The principle and way of designing framework in processing a prominent half elliptical sphere die exactly with a vertical lathe have been described in this article.
介绍在立式车床上精确加工凸形半椭球形冲模的原理及其机构设计方法。
The principle and way of designing framework in processing a prominent half elliptical sphere die exactly with a vertical lathe have been described in this article.
介绍在立式车床上精确加工凸形半椭球形冲模的原理及其机构设计方法。
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