“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 [`präp·ǝr `mō·shǝn] ^ASTRONOMY That component of the space motion of a celestial body perpendicular to the line of sight, resulting in the change of a star's apparent position relative to that of other stars; expressed in angular units.
随便看	oceanographic survey oceanographic vessel oceanography oceanology ocean station vessel ocean thermal energy conversion ocean tomography ocean weather station ocellar ocellus ocelot ocher ochlophobia Ochnaceae Ochoan Ochotonidae ochratoxin A ochre mutation Ochrept Ochrobium ochroleucous ochronosis Ochteridae Ochteroidea Ockham's razor

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