衰變期 的英文怎麼說

中文拼音 [shuāibiànqī]
衰變期 英文
decay period
  • 衰 : 衰動詞（衰弱） decline; wane
  • 期 : 期名詞[書面語]1. （一周年） a full year; anniversary 2. （一整月） a full month
  1. These radionuclides undergo radioactive decay, by emitting harmful alpha particles, beta particles or gamma rays

    它們在衰變期間會放出對人體有害的粒子粒子或射線。
  2. Given the decay rate of 26al, the lower initial ratio in the chondrules implies that these objects formed between one million and two million years after the creation of the refractory inclusions ( assuming that the radioisotope was indeed homogeneously distributed in the early solar system )

    以鋁26的衰變速率估計，這些球粒的初始比值較低，表示它們是在耐火包體產生后100 ~ 200萬年才形成（假設鋁26在早期太陽系中確實是均勻分佈的） 。
  3. This experiment to adopt the method that paraffin was cut into slices studied the structural growth process on appearance and dissect of pugionium cornutum ( l ) gaertn in germination period and young sprout ; and to adapt wild flower, fruit, seed and cultivated root, stem and leaf of pugionium cornutum ( l. ) gaertn in leaf lushing period and leaf exhausting period from eerduosi city proceeded the research on appearance and anatomies. the result enunciates : the organs of pugiorium cornutum ( l. ) gaertn in root, stem and leaf have started dividing in germination period ; the transporting tissue and storing water tissue in young sprout period has been divided ; the ransporting tissue is flourishing, but the supporting tissue is unflourishing, so the root, stem and leaf of pugionium cormutum ( l ) gaertn is suitable for edibility

    本試驗採用石蠟切片研究了沙芥發芽期、幼苗生長期各器官形態及解剖結構的變化過程；並對采自鄂爾多斯市野生沙芥花、果實、種子及人工栽培的葉片旺盛生長期、葉片生長衰退期的根、莖、葉等材料進行了形態及解剖學研究，結果表明：沙芥發芽期根、莖、葉各器官內組織已開始分化；幼苗期已分化出發達的輸導組織及貯水組織；葉片旺盛生長期各器官具有發達的輸導組織，但機械組織不發達，因此沙芥的根莖葉適于食用。
  4. The actual rate of decay may be somewhat greater or less than this expected rate.

    衰變的實際速率可以比這個預期速率稍大些或稍小些。
  5. There remained the generic conditions imposed by natural, as distinct from human law, as integral parts of the human whole : the necessity of destruction to procure alimentary sustenance : the painful character of the ultimate functions of separate existence, the agonies of birth and death : the monotonous menstruation of simian and particularly human females extending from the age of puberty to the menopause : inevitable accidents at sea, in mines and factories : certain very painful maladies and their resultant surgical operations, innate lunacy and congenital criminality, decimating epidemics : catastrophic cataclysms which make terror the basis of human mentality : seismic upheavals the epicentres of which are located in densely populated regions : the fact of vital growth, through convulsions of metamorphosis from infancy through maturity to decay

    生與死的痛苦。類人猿和尤其是人類女性那單調的月經，自初潮期一直延續到閉經期。海洋上礦山和工廠里那些不可避免的事故某些非常痛苦的疾病以及伴隨而來的外科手術生來的瘋顛，先天性犯罪癖導致人口大批死亡的傳染病在人類心靈深處種下恐怖種子的災難性特大洪水震中位於人口密集地區的大地震歷經劇烈變形，自幼年經過成熟期進入衰退期的生命成長的事實。
  6. Are regarded as high - level waste. the hlw contains highly - radioactive fission products and radionuclides with long - lived radioactivity

    ，屬于高放射性廢物，包含具高度輻射性的裂變產物和有長衰變期的放射性核素。
  7. Are regarded as high - level waste ( hlw ). the hlw contains highly - radioactive fission products and radionuclides with long - lived radioactivity

    ，屬于高放射性廢物，包含具高度輻射性的裂變產物和有長衰變期的放射性核素。
  8. Most of the ice age spans a period of time for which no element has an appropriate decay rate

    冰川期的大部分期間都找不到具有合適衰變率的元素。
  9. It is indicated that the hydration process of cement - based materials with slag, fly ash and silica fume is different in some degree from that of neat cement because of the difference in mineral structure and hydration mechanism. the periods of accelerating, decelerating and terminating are prolonged and hydration reaction decelerates. the second peak of rate curve of the heat evolution could be divided into two small peaks, which are contributed to the hydration of clinkers and mineral mixtures at the temperature of 30 but when temperature comes to 50, the two small peaks combine into one and the reaction accelerates

    結果表明，與硅酸鹽水泥相比，由於礦物摻合料與水泥熟料在活性和水化機理上的差異，水化歷程有較大的改變：多組分體系誘導期、加速期和衰減期延長，水化反應速率明顯降低；低溫時，水化放熱速率曲線上的第二放熱峰細化成分別對應于熟料和礦物摻合料水化的兩個小峰；高溫時，反應速率加快，雙峰合併；進一步研究發現，摻合料的種類與摻量對水化歷程也有較大的影響；建立了適用於多組分水泥基材料不同水化階段的水化動力學方程。
  10. 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

    這些物質半衰期為2萬4000年，幾乎已經全部消失（主要是經由自然的放射衰變過程） ，而且部份的鈽本身又經過核分裂，這可由其核分裂產物為證。
  11. Based on the climatic and phonological conditions at each stage, the development characteristics of the arthropod community as well as the management strategies of its dominant pests were discussed

    可將棗園節肢動物群落在時序上分為發展期、過渡期、鼎盛期和衰減期4個階段，並結合氣候、物候變化，討論了各階段群落的發生特點和主要害蟲的治理對策。
  12. Based on the study production of pavement performance interior and overseas, using the observed data of pavement condition, the paper analyzes the pavement performance of city hengshui, induces the disintegration curve and disintegration equation, and then forecasts to the pavement performance with the maintenance measure

    在綜合國內外路面使用性能的研究成果的基礎上，本文結合衡水市長期跟蹤及觀測的高等級公路的路況調查資料對衡水市路面使用性能進行分析，得出衡水市高等級公路路面使用性能的衰變曲線和衰變方程，進而結合採取的養護對策對路面使用性能進行預測。
  13. The most widely used diagnostic radioisotope is technetium - 99m which has a half - life of six hours and releases

    常用的放射性同位素為- 99m ，它的半衰期為六小時，在衰變過程中放出射線。
  14. By that is meant the time which elapses before half of the existing atoms have disintegrated or exploded.

    這里所指的半衰期是現存原子的一半發生衰變或爆炸所消耗的時間。
  15. The second part, with the aid of many types constructive transformation and symbolic computation ( especially wu algebraic elemination method ), some topics in nonlinear evolution equation are studied, including exact solution ( solitary solution, periodic solution, rational function solutions and jacobian function solution ), backlund transformation, cole - hopf transformation, dromion solution and its construction etc. charter 2 introduces ac = bd model and its application about partial differential equations

    第二部分以構造性的變換及符號計算特別是（吳代數消元法）為工具，來研究非線性演化方程中的一些問題：精確解（如孤子解、周期解、有理解和雅可比橢圓函數解（雙周期解）等） 、 backlund變換、 hopf變換， dromion解及衰變結構等第二章介紹了求解pdes的ac = bd模式及其在偏微分方程中的作用。
  16. However, it ceased publication after liberation but resumed distribution in 1996. the book, which is a collection of articles chosen from the magazine ? back issues, presents a picture of life of the family in different periods from which the reader can learn something about people ? thinking and feelings characteristic of the stable stages of china

    本書從該刊中精選了文章若干篇，反映了不同時代張家不同人物的生活經歷和悲歡離合，皆為真情實感，透過一家的興衰變化，折射出中國歷史穩定時期人的心靈和文化感悟，極具資料性和可讀性。
  17. It is not necessary to wait until half of a sample has decayed in order to measure the halflife.

    不必一直等到樣品衰變一半之後才測量它的半衰期。
  18. Most of earth ' s internal heat is generated by four long - lived radioisotopes ? potassium 40, thorium 232, uranium 235 and uranium 238 ? that release energy over billions of years as they decay into stable isotopes

    地球內部的熱能主要來自半衰期較長的四種放射性同位素鉀40 、釷232 、鈾235與鈾238 ，它們在幾十億年來逐漸衰變成穩定的同位素，同時釋放能量。
  19. The time it takes for half of its original amount to decay is called the half - life

    衰變至只剩下原來數目一半所需的時間稱為該核素的半衰期。
  20. ( 3 ) over the past 15 years, land, loess plateau of north of shanxi province, utilize degree rate of change r from one year < 0, prove that this district land is utilized and is in adjusting one or decline phase

    （ 3 ）從1986 2001年15年來，陜北黃土高原土地利用程度變化率r 0 ，說明該區土地利用處于調整期或衰退期。土地利用程度變化處于發展期的只有榆陽區、神木縣和吳堡縣三個地區。
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