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| organismo fossile | |||
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| petrificazione | |||
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fossil : 30 phrases in 13 subjects |
| Agriculture | 2 |
| Chemistry | 2 |
| Coal | 1 |
| Earth sciences | 1 |
| Ecology | 2 |
| Economics | 1 |
| Electronics | 3 |
| Energy industry | 5 |
| Environment | 3 |
| General | 1 |
| Life sciences | 4 |
| Medical | 1 |
| Metallurgy | 4 |