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光 活 性 : 36 phrases in 12 subjects |
| Agriculture | 4 |
| Animal husbandry | 1 |
| Automobiles | 1 |
| Chemistry | 1 |
| Dermatology | 1 |
| General | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Polymers | 5 |
| Technology | 17 |
| Telecommunications | 1 |
| Water resources | 2 |
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