氡很容易从地下释放到空气中并通过称为氡子核的短命衰变产物分解。

Radon escapes easily from the ground into the air, where it disintegrates through short-lived decay products called radon progeny.

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氡是天然放射性惰性气体，是铀系衰变链中的一个衰变产物。

As a product from the uranium disintegration, radon is a natural radioactive idle gas.

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几种氡的同位素的放射性气体，是放射性物质衰变的产物。

Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.

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