 |
| au naturel: 49 phrases in 17 subjects |
| Chemistry | 1 |
| Electronics | 5 |
| Engines | 1 |
| Fish farming pisciculture | 1 |
| Food industry | 15 |
| Forestry | 1 |
| General | 2 |
| Idiomatic | 2 |
| Metallurgy | 3 |
| Mining | 1 |
| Name of organization | 1 |
| Natural resourses and wildlife conservation | 4 |
| Nuclear physics | 6 |
| Politics | 1 |
| Proverb | 2 |
| Technology | 2 |
| Welding | 1 |