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углеродный : 36 phrases in 11 subjects |
| Aviation | 5 |
| Chemistry | 7 |
| Ecology | 3 |
| General | 1 |
| International Monetary Fund | 3 |
| Metal science | 1 |
| Nanotechnology | 1 |
| Nuclear physics | 2 |
| Oil / petroleum | 6 |
| Technology | 5 |
| United Nations | 2 |
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