Radon, the radioactive gas given off from the decay of naturally occurring uranium in soil, has been noted by the EPA to be a major environmental cause of lung cancer.[5]The
氡，放射性气体，由泥土中自然出现的铀衰变中释放。 EPA已经注意到它是肺癌的主要环境原因。
Radon is a gas that comes from the radioactive decay of radium in rocks.
氡是来自岩石中镭辐射衰变而产生的气体。
Radon is a gas that comes from the radioactive decay of radium in rocks.
氡是来自岩石中镭辐射衰变而产生的一种气体。
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