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光谱系 : 52 phrases in 12 subjects |
| Agriculture | 1 |
| Architecture | 1 |
| Aviation | 1 |
| Earth sciences | 13 |
| Electronics | 3 |
| Forestry | 1 |
| Geology | 2 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Remote sensing | 2 |
| Space | 5 |
| Technology | 17 |
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