| 词汇 | light year |
| 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。 |
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