This flashcard defines 'light-year' as a unit used to measure astronomical distances.
这个单词是光年，用于测量天文学距离的单位。
| 单词 | light-year |
|---|---|
| 发音 | ['laitjə:] |
| 释义 | n. 光年 |
| 词序 | 10051 |
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