light year的词源

英文词源

light year (n.)

also light-year, lightyear, "distance light travels in one year," 1888, from light (n.) + year.

中文词源

light year：光年

长度单位，光跑一年的距离。

该词的英语词源请访问趣词词源英文版：light year 词源，light year 含义。