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natural radioactive中文是什么意思

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用"natural radioactive"造句"natural radioactive"怎么读"natural radioactive" in a sentence

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  • 天然放射性的

例句与用法

  • Alpha particles are positively charged helium nuclei obtained from natural radioactive decay .
    粒子是从天然放射性蜕变得到的带正电的氦核。
  • Natural radioactive background
    天然放射性本底
  • It is now attributed to certain iron constituents in connection with natural radioactive radiation
    它也被视为是主教的宝石,因此他们时常佩带紫水晶戒指。
  • His work was done before the discovery of radioactivity and the understanding that natural radioactive decay provides a source of heat to the earth
    他的工作是做了,才发现放射性和谅解,即天然放射性衰变提供热源,以地球。
  • Trace amounts of natural radioactive materials , such as uranium , thorium and potassium with half - lives of up to one billion years , exist in soil
    泥土中含有微量的铀、钍和钾等天然放射性物质,这些放射性同位素的半衰期可以长达10亿年。
  • Trace amounts of natural radioactive materials , such as uranium , thorium and potassium with half - lives of up to one billion years , exist in soil
    泥土中含有微量的铀、钍和钾等天然放射性物质,这些放射性同位素的半衰期可以长达10亿年。
  • Although almost all this material , which has a 24 , 000 - year half - life , has since disappeared ( primarily through natural radioactive decay ) , some of the plutonium itself underwent fission , as attested by the presence of its characteristic fission products
    这些物质半衰期为2万4000年,几乎已经全部消失(主要是经由自然的放射衰变过程) ,而且部份的钸本身又经过核分裂,这可由其核分裂产物为证。
  • It is important that study gamma - ray spectrometry of field rock and soil in the earth ' s crust . its energies range between 30kev and 3000kev , where there is much information of natural radioactive nuclides , such as uranium , thorium , potassium , and information of artificial radioactive nuclides , such as cesium , americium , cobalt , and information of the results in interaction between gamma - ray and earth ' s crust
    研究表明:野外地面射线能谱测量主要研究地壳岩石土壤中产生的能量约为30kev 3000kev的射线,这里面包含着铀、钍、钾等天然放射性核素信息,核工程活动产生的大量人工放射性核素信息以及射线与地壳相互作用产生的相关信息。
  • Abstract : under the base of investigation and research on natural radioactive nuclein in coal of yili area , combining with the distributing characteristic and law of radioactive nuclein in coal of area and residents ' customer of using coal in yili area , the article raises decrement , resources , harmless and prevention and control measure of whole course managing rule with having a definite object in view and put foward a feasible plan and way for economie developmant of yili area , resonable development and utilization of coal resources , preventing from pollution because of mining and utilizing coal and further protecting people ' s health
    文摘:在对伊犁地区煤中天然放射性核素调查研究的基础上,结合伊犁地区煤中放射性核素分布的特点、规律以及伊犁地区居民的用煤习惯,有的放矢的提出了减量化、资源化、无害化以及全过程管理原则的防治措施,为伊犁地区的经济发展,煤炭资源的合理开发和利用,防止因煤炭的开采利用而造成的污染,建设性的提出了切实可行的方案和途径。
  • Even without these man made sources of radiation , exposed to natural background radiation . the rocks and soil of the earth s crust contain variable amounts of natural radioactive elements such as uranium and thorium . this varies with geography - for example the hottest places in britain are cornwall and around aberdeen
    就算排除人为辐射,人类会在天然环境中接触到本底辐射,如地球外壳的岩石和泥土含有份量不同的辐射元素如铀和钍,而份量视乎地理位置,如英国的康瓦尔和阿伯丁郡最为热点。
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