parsec
美音:[´pɑ:´sek
]
英音:[´pɑ:´sek
]
n.秒差距(1秒＝3.26光年)
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parsec为短语/超纲词汇
parsec
The parsec (symbol: pc) is a unit of length used in astronomy, equal to about 30.9 trillion kilometres (19.
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