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发射光谱谱线 : 31 phrases in 9 subjects |
| Agriculture | 1 |
| Earth sciences | 9 |
| Ecology | 2 |
| Electronics | 9 |
| Geology | 2 |
| Metallurgy | 5 |
| Space | 1 |
| Technology | 1 |
| Water resources | 1 |
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