light year
US /ˈlaɪt ˌjɪr/
UK /ˈlaɪt ˌjɪər/
名詞
1.
光年
a unit of astronomical distance equivalent to the distance that light travels in one year, which is nearly 6 trillion miles (9.46 trillion kilometers)
範例:
•
The nearest star to Earth, Proxima Centauri, is about 4.2 light years away.
離地球最近的恆星比鄰星距離我們大約 4.2 光年。
•
Astronomers use the light year to measure vast distances in space.
天文學家使用光年來測量宇宙中的巨大距離。
2.
光年, 巨大的差距
a very long distance or a great amount of time (used figuratively to emphasize a large difference)
範例:
•
Their technology is light years ahead of ours.
他們的技術領先我們好幾光年。
•
The two candidates are light years apart on this issue.
這兩位候選人在這個問題上的觀點相差好幾光年。