2. light-year的解释
3. 七彩网·英语单词大全
名词[…]lt;天[…]gt;光年
6. light-year什么意思
noun
1. the distance that light travels in a vacuum in 1 year[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;5.88 trillion miles or 9.46 trillion kilometers
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;Synonym: light year
