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半衰期 in a sentence

"半衰期" meaning in Chinese  
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  • Each radionuclide has a characteristic half - life . the half - lives of radionuclides may vary from millionths of a second to millions of years
    每种放射性核素都有其特定的半衰期,由几微秒到几百万年不等。
  • Each radionuclide has a characteristic half - life . the half - lives of radionuclides may vary from millionths of a second to millions of years
    每种放射性核素都有其特定的半衰期,由几微秒到几百万年不等。
  • It is well - known that the cited half - life is a particular parameter to evaluate the degree of ageing of periodicals or magazines
    摘要在期刊学术质量的评价指标中用来测度期刊老化程度的指标被引半衰期有其特殊性。
  • The eliminative speed also had difference in different tissues . t1 2b was the highest in the spleen , then in the liver and kidney
    稀土进入组织后消除速度也因组织不同而有所差异,消除半衰期以脾最高、其次是肝和肾。
  • We can talk about the half - life of a radioactive isotope , and indeed we can measure and state very very precisely what that half - life is
    我们可以谈论放射性同位素的半衰期,我们确实可以非常准确地测量和描述半衰期是什么。
  • Radioactive substances will speed up their dissipation to such a degree that what had hundreds of years of half life will simply cease to exist
    放射性物质将加速其解体,使得还有好几百年(放射性)的半衰期物质完全停止存在。
  • 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。
  • Since the half - lives of neptunium - 237 and its daughter radionuclides are relatively short comparing to the age of the earth , these radionuclides are not present in the earth nowadays
    由于- 237及其子体核素的半衰期远低于地球的年,它们现已不存在于地球上。相反,
  • After one half - life , the level of radioactivity of a radioactive material is halved , after two half - lives , it is reduced to one quarter and so on
    1 , 260 , 000 , 000年每经过一个半衰期,放射性物质的放射性便会剩下一半,经过二个半衰期,放射性便会剩下原先的四分之一,馀此类推。
  • 半衰期造句挺难的,這是一个万能造句的方法
  • After one half - life , the level of radioactivity of a radioactive material is halved , after two half - lives , it is reduced to one quarter and so on
    1 , 260 , 000 , 000年每经过一个半衰期,放射性物质的放射性便会剩下一半,经过二个半衰期,放射性便会剩下原先的四分之一,馀此类推。
  • This paper studies the character of cited half - life , and discusses the relationship among the periodicals concerning the cited half life , impact factors and cited times
    半衰期相对期刊个体而言并没有实际意义;相对同一学科的同一专业研究领域,半衰期对期刊具有一定的学术评价作用。
  • Phosphatase enzymes expedite the breakdown of phosphate monoesters in about 10 milliseconds . without the enzyme , the reaction ' s half - life would be a trillion years
    五、磷酸酶这种酵素,可以使磷酸单酯迅速在千分之一秒内完成分解。若没有这个酵素,这个化学反应的半衰期会是一万亿年。
  • The report mainly discusses the influence of chinese literature periodicals based on a quantitative analysis of cited times , cited journals , citation index and half - life
    报告主要从中国文学研究论文被引数量和被引广度、影响因子和半衰期等方面,具体分析了此间中国文学期刊的影响力状况。
  • Prostate ( pgi2 ) is stronger blood vessels and the expansion of the role of platelet inhibition , but because of the short half - life , performance instability , clinical efficacy not sure
    前列腺环素( pgi2 )具有更强的扩张血管和抑制血小板作用,但因其半衰期短,性能不稳定,临床应用疗效不肯定。
  • The challenges of globalization and open economy , has create an acute need for organization to overcome the reducing “ half - life of knowledge ” issue to stay competitive
    全球一体化和不断开放的经济环境向所有的企业发出了挑战,现在每个企业都迫切需要克服因为知识折旧加速(知识半衰期变短)而造成的竞争力的衰减。
  • A packed bed reactor filled with the immobilized cells was developed to continuously produce l - alanine from l - aspartic acid . the reactor with100g / l substrate solution had been running for 20 days at 37
    在温度37 、底物浓度100g l的条件下,该固定化细胞在填充床反应器中连续运行20天,测得其半衰期为71天。
  • This is not very interesting in radioactivity , because the number of atoms we look at is usually so huge that for practical purposes we can forget about the possibility of half - lifes getting shorter
    这在放射性方面不是很有意义,因为我们所观察的原子数目通常很大,以至于在实用上我们可以忘记半衰期变短的可能性。
  • A single dose should suffice when an antibiotic having a long half - life is given , and may also be adequate when certain antibiotics without an especially long half - life , such as cefotaxime , are used
    当给于一个有长的半衰期的抗生素,即或是一些没有没有特别长的半衰期的抗生素,如头孢他啶,单一剂量的使用也已经足够了。
  • As soon as the plants or animals die , the uptake of carbon - 14 will cease and the amount of carbon - 14 will decrease with time due to radioactive decay . the half - life of carbon - 14 is about 5 , 730 years
    但当植物和动物死去,他们便会停止吸取碳- 14 。碳- 14的份量因衰变会随时间而减少,每经过一个半衰期(即大约5 , 730年) ,含量便会减半。
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