 |
| separation: 52 phrases in 17 subjects |
| Chemistry | 6 |
| Coal | 1 |
| Communications | 1 |
| Cultural studies | 1 |
| Earth sciences | 10 |
| Ecology | 2 |
| Electronics | 12 |
| Environment | 2 |
| General | 3 |
| Information technology | 1 |
| Law | 4 |
| Mathematics | 1 |
| Medical | 3 |
| Natural sciences | 1 |
| Nuclear physics | 1 |
| Technology | 1 |
| Transport | 2 |