The radon and its daughter elements are the decay products of the radioactive elements such as uranium and thorium and the important carcinogenic factor of causing the lung cancer.

氡及其子体是铀、钍等放射性元素产物，是引发肺癌的重要致病因子。

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What are the elements of your role as a daughter, a girlfriend, a career woman, a wife, a mother, that bring you joy?

在你扮演女儿、女友、职业女性、妻子、母亲的这些角色中，哪些因素能给你带来欢乐？

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She could tell us about unique elements of her upbringing or experiences that have made her who she is the daughter of a Finnish-American artist and an engineer father, a Midwesterner, and an accomplished engineer in her own right.

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