 |
| |||
| background radiation | |||
| background | |||
| фоновая радиация: 7 phrases in 6 subjects |
| Astronautics | 1 |
| Construction | 1 |
| Ecology | 2 |
| Environment | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |
|
| |||
| background radiation | |||
| background | |||
| фоновая радиация: 7 phrases in 6 subjects |
| Astronautics | 1 |
| Construction | 1 |
| Ecology | 2 |
| Environment | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |