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致命量 : 12 phrases in 9 subjects |
| Animal husbandry | 1 |
| Aviation | 1 |
| Ecology | 1 |
| Mathematics | 3 |
| Metallurgy | 1 |
| Nuclear physics | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 1 |
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