precise ephemeris的用法和樣例：
例句
- You may use the on-line New Object Ephemeris Generator to generate ephemerides to enable you to find the object after the first night.
你可以使用在線(xiàn)星歷表生成器來(lái)計算你發(fā)現的目標的以后的位置預報。 - In this paper, we describe two methods for computing the coordinates and velocities of satellites by using the broadcast ephemeris of the "transit" satellites.
本文介紹利用子午衛星的廣播星歷表計算衛星坐標和速度的兩種方法。
