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变换 光谱 : 62 phrases in 11 subjects |
| Agriculture | 7 |
| Chemistry | 5 |
| Earth sciences | 7 |
| Ecology | 2 |
| Electronics | 13 |
| Geology | 7 |
| Plastics | 1 |
| Polymers | 6 |
| Space | 3 |
| Technology | 8 |
| Water resources | 3 |
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