Two sphere model 双球模型
The two-sphere model arises from some very simple observations of the stars which anyone can make.
这种双球面学说是根据任何人都能做到的对星星的简单观察而提出的。
In this paper we suggest a two-sphere model in which we assume that there is internal motion between two spheres but they keep separation from each other for simplifying particle-chain in ERF.
为了具体分析这种关系，采用不分离但有相互运动的双球构成的系统去简化粒子链。
A two-dimensional model of such a universe would look like a sphere. It's impossible to have parallel geodesics (straight lines on a curved surface) — the two lines will cross at some point.
这样的2维宇宙模型就像是球体，不可能出现平行的测地线(测地线是曲面上的直线)——两直线必然在某点相交。
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