 |
| radiation background: 84 phrases in 20 subjects |
| Astronautics | 2 |
| Astronomy | 6 |
| Astrophysics | 1 |
| Biology | 1 |
| Business style | 1 |
| Construction | 2 |
| Ecology | 5 |
| Environment | 1 |
| Geography | 1 |
| Makarov | 17 |
| Medical | 6 |
| Medical appliances | 3 |
| Military | 11 |
| Nanotechnology | 3 |
| Nuclear physics | 6 |
| Physics | 4 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 9 |
| Радиоактивное излучение | 1 |