释义 |
〔retrograde〕Of or relating to the brief, regularly occurring, apparently backward movement of a planetary body in its orbit as viewed against the fixed stars, caused by the differing orbital velocities of Earth and the body observed.后退的:行星所做的短暂有规律的运动的,以静止星体为参照物进行观察时,这种运动显然是后退的,这是由地球和所观察天体具有不同的轨道速度引起的 |