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氧 活 化 : 97 phrases in 16 subjects |
| Agriculture | 4 |
| Architecture | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| Chemistry | 2 |
| Ecology | 5 |
| Electronics | 8 |
| Genetics | 1 |
| Geophysics | 3 |
| Metallurgy | 8 |
| Oil / petroleum | 5 |
| Polymers | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 38 |
| Water resources | 16 |
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