| 释义 |
light yearBrE /ˈlaɪt jɪə(r)/ , /ˈlaɪt jɜː(r)/ NAmE /ˈlaɪt jɪr/ noun (astronomy天文学) the distance that light travels in one year , 9 .4607 × 10 12 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。light years [pl. ]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。 |