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| réaction en chaîne | |||
| réactions couplées | |||
| réaction nucléaire en chaîne | |||
| chain reaction: 44 phrases in 12 subjects |
| Biotechnology | 2 |
| Chemistry | 6 |
| Earth sciences | 6 |
| General | 1 |
| Health care | 8 |
| Life sciences | 8 |
| Medical | 1 |
| Natural sciences | 2 |
| Nuclear and fusion power | 2 |
| Nuclear physics | 2 |
| United Nations | 3 |
| Virology | 3 |
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