 |
| |||
| environmental study; environmental survey | |||
| изучение состояния окружающей среды: 10 phrases in 7 subjects |
| Astronautics | 1 |
| Ecology | 2 |
| Energy industry | 3 |
| Technology | 1 |
| United Nations | 1 |
| Water supply | 1 |
| Weapons of mass destruction | 1 |
|
| |||
| environmental study; environmental survey | |||
| изучение состояния окружающей среды: 10 phrases in 7 subjects |
| Astronautics | 1 |
| Ecology | 2 |
| Energy industry | 3 |
| Technology | 1 |
| United Nations | 1 |
| Water supply | 1 |
| Weapons of mass destruction | 1 |