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light year

noun
🔊/ˈlaɪt jɪə(r)/, 🔊/ˈlaɪt jɜː(r)/
🔊/ˈlaɪt jɪr/
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  1. (astronomy天文学) the distance that light travels in one year, 9.4607 × 1012 kilometres光年（指光在一年中走过的距离，为 9.4607 × 1012 公里）
    • The nearest star to earth is about 4 light years away.地球离最近的恒星大约为 4 光年。🔊🔊
    Topics Spacec2
  2. light years
     [plural] a very long time很长时间；很久
    • Full employment still seems light years away.充分就业好像依然遥遥无期。🔊🔊
    • The new range puts us light years ahead of the competition.这个新的系列让我们远远领先于竞争对手。