更妙的是，显然人们可以用放射性作为时钟，用衰变系列的半衰期计算出岩石的年龄。
Better still, it became apparent to him that one could use radioactivity as a clock, with the half-life of a decay series enabling us to calculate the age of a rock.
提出了放射性递次衰变系列中存在的长期平衡公式的证明问题，指出该问题可以利用巴特曼公式来解决。
The truth of the secular equilibrium formula in radioactive cascade decay series is proved with the use of the Bateman formula.
提出了放射性递次衰变系列中存在的长期平衡公式的证明问题，指出该问题可以利用巴特曼公式来解决。
The truth of the secular equilibrium formula in radioactive cascade decay series is proved with the use of the Bateman formula.
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