| 单词 | celestial horizon |
| 释义 | celestial horizon celestial horizon n.（名词）A great circle on the celestial sphere having a plane that passes through the center of the earth and is parallel to an observer's horizon.Also called rational horizon 天球地平圈：天球上的一个大圆，有一个通过地球的中心并与观察者的视野平行的平面也作 rational horizon |
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