 |
| persistent: 16 phrases in 7 subjects |
| Chemistry | 5 |
| Ecology | 1 |
| Environment | 1 |
| General | 1 |
| Geology | 5 |
| Metrology | 1 |
| Natural resourses and wildlife conservation | 2 |
|
| persistent: 16 phrases in 7 subjects |
| Chemistry | 5 |
| Ecology | 1 |
| Environment | 1 |
| General | 1 |
| Geology | 5 |
| Metrology | 1 |
| Natural resourses and wildlife conservation | 2 |