a deposit of radioactive material formed by the decay of a radioactive gas or emanation (emanation, n. 2c).
| 单词 | θ79586 |
| 释义 | the world > matter > physics > atomic nucleus > radioactive isotope > radioactive nuclide > [noun] > radioactive deposit (1) active deposit1904 a deposit of radioactive material formed by the decay of a radioactive gas or emanation (emanation, n. 2c). |
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