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	trochili trochilidae trochilidine trochiline trochilus troching trochiscation trochiscus trochite trochitic trochlea trochlear trochlear trochlear fossa trochleariform trochlearis trochlear muscle trochlear nerve trocho- trocho trochoblast trochocephalia trochocephalic trochodendraceae trochodendraceous

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