light year

US 
UK 
  • n.光年(指光在一年中走过的距离:9.4607 × 10&sup12 公里)
  • Web光年俊驹
Plural Form:light years  
light year
n.
1.
光年(指光在一年中走过的距离:9.4607 × 10&sup12 公里)the distance that light travels in one year, 9.4607 × 10&sup12 kilometres
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。
2.
[pl]
很长时间;很久a very long time
Full employment still seems light years away.
充分就业好像依然是遥遥无期。

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