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proper motion
['prɔpə'məuʃ(ə)n]
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earth.sc.
自移
met.
固有运动
space
自行
(天文学名词)
;
固有 〔自然〕运动
sport.
★
自行
English thesaurus
Proper Motion
['prɔpə'məuʃ(ə)n]
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sport., abbr.
PM
proper-motion
:
17 phrases
in 3 subjects
Astronomy
4
Space
2
Technology
11
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