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| delfin (Cephalorhynchus heavisidei, Delphinapterus leucas, Delphinidae delphinapteridae, Delphinus delphis delphis, Grampus griseus, Lagenorhynchus acutus, Lagenorhynchus albirostris, Lagenorhynchus obscurus, Tursiops truncatus) | |||
| delfin (Delphinus delphis) | |||
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| delfiner (Delphinidae); delfin-familien (Delphinidae) | |||
| Delphin: 16 phrases in 3 subjects |
| Fish farming pisciculture | 5 |
| Natural resourses and wildlife conservation | 6 |
| Natural sciences | 5 |