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explosion : 204 phrases in 24 subjects |
| Agriculture | 3 |
| Automated equipment | 1 |
| Chemistry | 12 |
| Coal | 51 |
| Demography | 1 |
| Earth sciences | 14 |
| Economics | 10 |
| Electronics | 3 |
| Energy industry | 8 |
| Forestry | 1 |
| General | 40 |
| Industry | 6 |
| Information technology | 2 |
| Life sciences | 5 |
| Materials science | 2 |
| Mechanic engineering | 14 |
| Medical | 12 |
| Metallurgy | 5 |
| Microsoft | 1 |
| Natural sciences | 1 |
| Nuclear physics | 1 |
| Packaging | 3 |
| Physical sciences | 1 |
| Transport | 7 |