单词

radon

读音

ˈreɪdɒn

美式 ˈreɪdɑːn

英式 ˈreɪdɒn

词根

无

释义

["n. [化学] 氡（元素符号Rn）\n n. (Radon)人名；(法、塞)拉东"]

例句

Radon comes from radium decay.

氡来自镭的衰变。

Radon is radioactive and hazardous.

氡有放射性，是有害物质。

Radon and asbestos.

氡和石棉。

强化记忆

无

看视频学发音

One scan is comparable to what you’re exposed to over two or three yearsfrom natural radioactive sources, like radon gas;or the amount a pilot would rack up

nearby researchers recorded surprisingly high concentrationsof the radioactive isotope pair: radon and thoron.As stress builds up in the crust right before an earthquake,

microfractures allow these gases to escape to the surface.These scientists think that if we built a vast network of radon-thoron detectorsin earthquake-prone areas,

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