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| natural backcloth (на телеэкране); natural backdrop (на телеэкране) | |||
| natural backdrop | |||
| natural background | |||
| natural background radiation; natural radiation background | |||
| естественный фон: 20 phrases in 13 subjects |
| Astronautics | 1 |
| Business style | 1 |
| Ecology | 2 |
| Energy industry | 1 |
| General | 1 |
| Genetics | 1 |
| Makarov | 4 |
| Medical | 1 |
| Military | 1 |
| Navigation | 1 |
| Nuclear physics | 4 |
| Security systems | 1 |
| Technology | 1 |