相關字詞組
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天火字典

英日字典: l.y.



The l.y. has 1 Senses.

  • light year, light-year
  • 光年, l.y.
  • the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
  • 1年に真空中を光が走る距離

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