The radon and its daughter elements are the decay products of the radioactive elements such as uranium and thorium and the important carcinogenicfactor 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。
2
Not only are they potentially carcinogenic, but they contribute to stripping the skin's Natural Moisture Factor, leaving the immune system vulnerable.