Radon comes from radium decay.

氡来自镭的衰变。

Radon can also be found in water.

氡也可在水中找到。

Radon is radioactive and hazardous.

氡有放射性，是有害物质。

Radon levels in homes can be reduced by

可通过以下方法降低家中的氡水平

Radon and asbestos.

氡和石棉。

Outdoor radon levels are usually very low.

室外的氡水平通常很低。

What is radon?

氡是什么？

Installing a radon sump system in the basement.

在地下室安装氡蓄贮系统。

the routes available for the passage of radon into the home

可供氡进入家中的途径

Most of the radon-induced lung cancer cases occur among smokers.

氡引起的多数肺癌病例发生在吸烟者中。

Two other air pollutants require some mention: radon and asbestos.

另外两种空气污染需要某种提示：氡和石棉。

Avoiding the passage of radon from the basement into living rooms.

避免氡从地下室进入生活用房。

Estimate the global health impact of exposure to residential radon.

估计接触住宅中氡的全球健康影响。

Radon is much more likely to cause lung cancer in people who smoke.

氡更容易使吸烟者患肺癌。

Due to dilution in the air, outdoor radon levels are usually very low.

鉴于在空气中的稀释，室外的氡水平通常很低。

Identify effective strategies for reducing the health impact of radon.

确认减轻氡对健康影响的有效战略。

When inhaled, the radiation exposure from radon may lead to lung cancer.

当吸入之后，来自氡的放射暴露可导致人们罹患肺癌。

Radon is the second most important cause of lung cancer in many countries.

在许多国家中，氡是肺癌的第二种最重要病因。

Radon is a natural radioactive gas that emanates from the ground into the air.

氡是一种放射性的自然气体，从地下散发到空气中。

When radon ventilation fans are added radon levels can even be reduced further.

当增加氡换气扇时，可进一步降低氡的水平。

Scientists in China, Russia, and the United States measure radon in ground water.

中国、俄罗斯和美国的科学家测量地下水的氡含量。

Building codes should be implemented to reduce radon levels in homes under construction.

应采用建筑规范，在住宅建筑中减少氡的水平。

Radon is a chemically inert, naturally occurring radioactive gas without odour, colour or taste.

氡是一种自然产生的放射性惰性气体，它无色、无味、无臭。

Radon is a chemically inert, naturally occurring radioactive gas. It has no smell, colour or taste.

氡是一种天然产生的放射性惰性气体，它无色、无味、无臭。

Significant health effects have been seen in uranium miners who are exposed to high levels of radon.

在接触高水平氡的铀矿工人中观察到显著的健康影响。

Radon levels are usually higher in basements, cellars or other structural areas in contact with soil.

氡水平在地下室、地窖或与泥土接触的其它结构区通常较高。

Overall, reducing radon exposure is an important contribution to the goal of good quality indoor air.

在总体上，减少氡接触对实现优质室内空气的目标具有很重要的作用。

Passive systems of mitigation have been shown to be capable of reducing indoor radon levels by up to 50%.

无源的缓解系统已显示有能力使室内氡的水平降低多达50%。