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| solar observation; sun observation | |||
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太阳 观测 : 39 phrases in 8 subjects |
| Aviation | 2 |
| Cartography | 2 |
| Earth sciences | 6 |
| Electronics | 4 |
| General | 3 |
| Space | 14 |
| Technology | 7 |
| United States | 1 |
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