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单词 light year
释义

light year

From Longman Dictionary of Contemporary EnglishRelated topics: Measurement, Astronomylight yearˈlight year noun [countable]  1 TMHAthe distance that light travels in one year, about 9,460,000,000,000 kilometres, used for measuring distances between stars a star 3,000 light years from Earth2 light years ahead/better etc than something3 light years ago
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更新时间:2026/6/6 18:38:30