英语词汇“proper motion”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	proper motion
释义	proper motion noun : the apparent change in position of a star usually expressed in seconds of arc per year that results from the projection on the celestial sphere of its motion with respect to the solar system — see tangential motion
随便看	cooperatively cooperativeness cooperator cooperculum coopered coopered joint cooperer cooper hawk cooper-hewitt lamp cooperia cooperid coopering cooperite cooper pair coopers cooper's cooper's flag cooper's hawk cooper's ligament cooper's reed coopery cooping co-ops coops co-opt

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