 |
| |||
| zone de combustion secondaire (of a flame); zone de diffusion (of a flame); zone externe (of a flame); cône externe (of a flame); panache m (of a flame) | |||
| outer zone: 4 phrases in 3 subjects |
| Astronomy | 2 |
| Construction | 1 |
| Natural resourses and wildlife conservation | 1 |