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。
Not only are they potentially carcinogenic, but they contribute to stripping the skin's Natural Moisture Factor, leaving the immune system vulnerable.
聚乙二醇类不仅有潜在的致癌作用，还能导致肌肤的天然滋润成分剥离，使免疫系统易受攻击。
Carcinogenic mechanism of psychological factor.
心理因素致癌的机制。
Carcinogenic mechanism of psychological factor.
心理因素致癌的机制。
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