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。
2
A two-sphere system with a two-lens zero-power corrector placed behind the secondary mirror was discussed.
讨论了双贴合无光焦度校正板放在次镜后的双反射球面系统。
3
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.