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radiactividad : 38 phrases in 12 subjects |
| Chemistry | 2 |
| Earth sciences | 8 |
| Electronics | 1 |
| Environment | 7 |
| General | 4 |
| Mechanic engineering | 1 |
| Medical | 2 |
| Natural sciences | 2 |
| Nuclear and fusion power | 1 |
| Nuclear physics | 5 |
| Physical sciences | 3 |
| Technology | 2 |
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