The personal strain about radioactive workers had some main influential factors of, such as physical environment, age, role boundary, radioactive age, responsibility, collaboration and role overload.

晶状体混浊率随着放射工龄的增加而增加。个体紧张反应的主要影响因素：工作环境、年龄、任务冲突、放射工龄、责任感、与同事合作和任务过重。

youdao

Planetary scientists can determine a rock's age by calculating how many radioactive "parent" isotopes of a particular element have decayed into "daughter" isotopes.

行星科学家们可以通过计算一个特定元素有多少“母亲”放射性同位素衰变为“女儿”同位素来确定岩石的年龄。

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The downsides were also great. Marie's work with radioactive elements inflicted serious burns to her arms and hands - and perhaps triggered the leukemia that killed her at age 58.

居里夫人长期从事放射性元素研究，身体每况愈下，放射性元素严重灼伤她了胳膊和手臂，或许还引起致她死亡的白血病，年仅58岁。

youdao

Not until the nineteen fifties did scientists, using radioactive dating, place the age of the Earth at over four billion years.

VOA: special.2009.12.01

What if actual result of decay would not follow the sequence of 50% remaining rule in which it would take a shorter period to become inactive in decay instead of that 5730 years, using 5730 years as a base to presume that the decay would last in every half year would simply falsify the age that would be computed through radioactive dating method.

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