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parallax second
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astr.
秒差距
等于3.26光年
earth.sc.
秒差距
天文距离单位，相当于3.258光年
el.
秒差距
视差为一秒的距离，相当于3.259光年
space
秒差距
(天文距离单位，视差为 1 秒的距离,相当于 3. 259光年)
tech.
秒差距
parallax second
:
4 phrases
in 3 subjects
Aviation
1
Geophysics
1
Space
2
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