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。

youdao

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。

youdao

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。

youdao

The collection is built around a half- or full-sapphire sphere in which tiny diamonds are inserted along with a clear liquid.

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