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。
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.
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。
The influences of pipe materials and organic substances to decay of chlorine series disinfectants were studied.
同时，还研究了管材与水体中的有机物对氯系消毒剂衰减的影响及动力学行为。
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