| 释义 |
光年 guāng nián ☆☆☆☆☆q.量词⁰·⁰⁰⁰⁶ᴾᵃ¹⁵⁴⁰⁰
基本例句
light-yearlightyearlight year
一光年的距离大得令人难以想象。The distance of a light year boggles the imagination.
1光年是以每秒186000英里的速度走过一年的距离，约为6万亿英里。A light year is the distance which light travels at186,000 miles per second in one year, namely6 million million miles.
天津四，天鹅α星在天鹅座最亮的一颗恒星，距地球大约有1，630光年The brightest star in the constellation Cygnus, approximately1,630 light-years from Earth.
北河二双子座中的一颗双星，是这组星中最明亮的一颗，距地球约46光年A double star in the constellation Gemini, the brightest star in the group, approximately46 light-years from Earth. |