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| период полураспада (радиоактивного элемента) | |||
| период полураспада | |||
| полупериод | |||
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半周期 : 13 phrases in 6 subjects |
| Electronics | 1 |
| General | 1 |
| Geophysics | 1 |
| Mathematics | 1 |
| Pharmacology | 1 |
| Technology | 8 |
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