英语词汇“radiothorium”的意思、释义、用法解释及翻译-春雷网

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词汇	radiothorium
释义	Definition of radiothorium in English: radiothorium noun historical An isotope of thorium (thorium-228) which occurs in small amounts in natural thorium and is formed by the beta decay of actinium-228, and which itself decays by alpha emission with a half-life of 1.9 years; (also) a mixture of radioactive isotopes of thorium, actinium, and radium, present as decay products in natural thorium. Origin Early 20th century; earliest use found in Journal of the Chemical Society. Definition of radiothorium in US English: radiothorium noun historical An isotope of thorium (thorium-228) which occurs in small amounts in natural thorium and is formed by the beta decay of actinium-228, and which itself decays by alpha emission with a half-life of 1.9 years; (also) a mixture of radioactive isotopes of thorium, actinium, and radium, present as decay products in natural thorium. Origin Early 20th century; earliest use found in Journal of the Chemical Society.
随便看	specularity specularly speculate speculate about speculated speculates speculating speculation speculations speculative speculative builder speculative fiction speculatively speculatively speculativeness speculativeness speculativenesses speculator speculator speculators speculum speculum metal sped sped speech

　

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