| 释义 |
radioactive seriesn.（名词）- A group of isotopes representing various stages of radioactive decay in which the heavier members of the group are transformed into successively lighter ones, the lightest being stable.放射系：代表放射性衰变不同阶段的一组同位素，较重的元素连续地转化成较轻的元素，最轻的元素变得稳定
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