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| radioactive substance Any substance that contains one or more radionuclides of which the activity or the concentration cannot be disregarded as far as radiation protection is concerned | |||
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sustancias radiactivas : 15 短语, 4 学科 |
| 核物理 | 4 |
| 法律 | 2 |
| 环境 | 5 |
| 电子产品 | 4 |