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| półokres rozpadu (czas wymagany do rozpadu połowy ilości radioaktywnych atomów) | |||
| czas połowicznego rozpadu | |||
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demi-vie : 8 phrases in 5 subjects |
| Chemistry | 2 |
| General | 2 |
| Life sciences | 1 |
| Medical | 1 |
| Nuclear and fusion power | 2 |
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