(dōng) — 라돈 (화학 원소 Rn)

noun
라돈 (화학 원소 Rn)

예문

  • Zhè zhǒng jiàn zhù cái liào lǐ hán yǒu dà liàng dōng.
    This building material contains a large amount of radon.
  • Nǐ zuì hǎo qǐng zhuān yè rén yuán lái jiǎn cè jiā lǐ de dōng hán liàng.
    You'd better ask professionals to measure the radon level in your home.
  • Cháng qī bào lù zài gāo nóng dù de dōng xià huì zēng jiā huàn ái fēng xiǎn.
    Long-term exposure to high concentrations of radon increases the risk of developing cancer.

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