nighttime
| ozone value
| nighttime | |
| meteorol. | noche, por la noche, de noche, nocturno |
| ozone value | |
| life.sc. environ. | valor del ozono |
| |||
| noche, por la noche, de noche, nocturno | |||
|
nighttime : 13 phrases in 4 subjects |
| Earth sciences | 1 |
| Law | 1 |
| Life sciences | 3 |
| Meteorology | 8 |