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| rosso rubino | |||
| rubino m | |||
| Anglais glossaire | |||
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| Name in Latin, Rubeus Red, Corundum group, aluminum oxide. | |||
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| Ringing Up about Breastfeeding (bigmaxus) | |||
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ruby : 20 phrases, 7 sujets |
| Charbon | 2 |
| Chimie | 2 |
| Électronique | 1 |
| Industrie | 7 |
| Médical | 1 |
| Métallurgie | 6 |
| Sciences de la Terre | 1 |