| 释义 |
天顶
基本例句
zenithvertexroofcelestial pole
天顶太阳或别的天体在天空中所达到的最高点；天顶The highest point in the sky reached by the sun or another celestial body; a zenith.
天底天球上，在观测者垂直向下的一点，与天顶完全相对A point on the celestial sphere directly below the observer, diametrically opposite the zenith. |