文章简要介绍了对氡辐射危害的认识过程，综合分析了住房内氡气辐射时的水平及其监测方法，提出了降低住房内氡气浓度的方法和措施。

The paper described the understanding history of the risk of radon exposure, the level and supervision of indoor radon exposure and the countermeasures for reducing the radon concentration in indoors.

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