释义 |
ˈlight year n [C] 1 the distance that light travels in one year (about 9,460,000,000,000 kilometres), used for measuring distances between stars 光年〔光在一年中传播的距离〕 2 light years ahead/better etc than sth informal much more advanced, better etc than someone or something else【非正式】比某物超前很多/好很多等 |