radon

/ˈɹeɪdɒn/

Meanings

noun

氡

The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.

Examples :

"Many homes are tested for radon because this invisible, radioactive gas can be harmful to breathe. "

许多房屋都会检测氡气，因为这种无色无味、具有放射性的气体如果被人吸入，可能会对健康造成危害。

Related Words

harmful adjective

/ˈhɑːmfl̩/ /ˈhɑɹmfl̩/

有害的，不利的

"Wear a hat to protect your skin from harmful sunlight."

戴帽子可以保护你的皮肤，避免受到有害阳光的伤害。

symbol noun

/ˈsɪmbəl/

符号，象征。

"$ is the symbol for dollars in the US and some other countries."

$ 是美国和一些其他国家表示美元的符号。

radioactive noun

/ˌɹeɪdioʊˈaktɪv/ /ˌɹeɪdioʊˈæktɪv/

放射性物质，放射物

"The radioactive was carefully stored in a lead-lined container at the science lab. "

科学实验室里，那些放射性物质被小心地储存在一个铅衬容器中。

because adverb

/bɪˈkɒz/ /biˈkɔz/

因为，由于。

"I went to the park because the weather was nice. "

因为天气很好，所以我去了公园。

element noun

/ˈɛlɪmənt/

要素，成分，元素。

"Letters are the elements of written language."

字母是书面语言的基本要素。

formerly adverb

/ˈfɔːməli/ /ˈfɔɹmɚli/

以前，先前.

"My formerly quiet neighborhood is now very busy with new construction. "

我以前安静的社区现在因为新的建筑工程变得非常繁忙。

colorless adjective

/ˈkʌlərləs/ /ˈkʌlɚləs/

无色的，没有颜色的

"The water in the glass was completely colorless, like pure, clear liquid. "

杯子里的水完全是无色的，就像纯净透明的液体一样。

odorless adjective

/əʊdələs/

没有气味的，无气味的

"They were taken unawares and overcome when the room filled with a lethal, odorless gas."

他们毫无防备，当房间里充满了致命的、无色无味的气体时，就被制服了。

chemically adverb

/ˈkɛmɪkli/ /ˈkɛmɪkəli/

化学地，用化学方法。

"The stain was chemically removed from the shirt using bleach. "

这件衬衫上的污渍是用漂白剂通过化学方法去除的。

invisible noun

/ɪnˈvɪzəb(ə)l/

上帝，神。

"Some people believe in an invisible, as the Supreme Being. "

有些人信仰一位看不见的上帝。

breathe verb

/bɹiːð/ /bɹið/

呼吸，喘气

"Before the big presentation, Sarah took a deep breath and felt more calm. "

在大型演示之前，萨拉深吸一口气，感觉更平静了。

chemical noun

/ˈkɛmɪkəl/

化学物质，化学品

"The scientist studied the chemical composition of the soil sample. "

这位科学家研究了土壤样本的化学物质组成。