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| astronomical year (365 日 5 时 48分 45. 68秒); astronomical year | |||
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天 文 年 : 17 phrases in 6 subjects |
| Desert science | 1 |
| Earth sciences | 2 |
| General | 5 |
| Oil / petroleum | 2 |
| Space | 4 |
| Technology | 3 |
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