“proper motion”的概念、定义、翻译、参考文献-科学参考

单词	proper motion
释义	proper motion Encyclopedia 理学天体测量学释 proper motion自行恒星在一年内沿着垂直于视线方向走过的距离对观测者所张的角度。其单位为角秒/年。 Mathematics proper motion正常运动，固有运动 Astronomy proper motion缩写：P.M.。自行
随便看	original network original permutation original planet original position analysis for metal original position analysis for metal (OPA) Original print Original Publication Project (Lists of A Hundred Books in Three Categories) original selection Original Sin original soundtrack of movie music original space original species original star original sun original text Original theory of Chinese economy original time original triangle original video of Japan's Surrender to China original water Origin and Development of Chinese Literature Origin and Development of Manchus origin and evolution of solar system origin and formation of Chinese opera origin and propagation of cosmic rays

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。