氡子核在衰变时发射出放射性阿尔法粒子，这些粒子可附着于空气中的浮质、灰尘及其它粒子。
As radon progeny decay, they emit radioactive alpha particles and attach to aerosols, dust and other particles in the air.
企业周围应无有害气体、烟尘、灰尘、放射性物质及其他扩散性污染源。
There shall be no harmful gas, soot, dust, radioactive substances or other diffusible sources of pollution around the enterprise.
蒸汽沉结为灰尘，这种灰尘不光有毒，而且有放射性。
The vapor settles as dust, which is not only poisonous, but also radioactive.
蒸汽沉结为灰尘，这种灰尘不光有毒，而且有放射性。
The vapor settles as dust, which is not only poisonous, but also radioactive.
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