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| activité f | |||
| activité nucléaire; taux de désintégration | |||
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aktivita : 73 phrases in 12 subjects |
| Astronomy | 2 |
| Chemistry | 3 |
| Construction | 8 |
| Earth sciences | 2 |
| Economics | 3 |
| Environment | 8 |
| Health care | 10 |
| Microsoft | 32 |
| Nuclear physics | 1 |
| Physical sciences | 2 |
| Politics | 1 |
| Research and development | 1 |