| 单词 | light second |
| 释义 | light second (once / 3939771 pages) n WORD FAMILY light second: light seconds USAGE EXAMPLESHalf of this gave them the distance from the star in light seconds. Campbell, John Wood, Islands of Space(2010) n the distance light travels in a vacuum in one second; approximately 300,000 kilometers Hyper astronomy unit a linear unit used for astronomical distances |
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