放射性碳 的英文怎麼說

中文拼音 [fàngshèxìngtàn]
放射性碳 英文
radioactive carbon放射性碳測定年齡 [核物理] carbon-14 dating; radioactive carbon dating; radiocarbon dating; 放射性碳測年[年代測定] radiocarbon dating; 放射性碳年代測定技術 radio-carbon dating technique; 放射性碳年齡 radiocarbon age
  • 放 : releaseset freelet go
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 碳 : 名詞[化學] （非金屬元素） carbon （c）
  • 放射性 : [物理學] radioactivity; activity; emissivity
  • 放射 : radiate; emit; blas; radiation; emission; shooting; shedding; abjection; emanation; effluence
  1. When the organism dies, no new radioactive carbon is assimilated.

    機體死後，不能再吸取新的放射性碳。
  2. Researchers use radiocarbon to study certain biological processes.

    研究人員藉助放射性碳來研究某些生物過程。
  3. The leaf was allowed to photosynthesize in the presence of radiocarbon.

    葉子被允許同放射性碳進行光合作用。
  4. The technique is so sensitive that it can detect a single radioactive carbon atom hiding among a quadrillion ( one million billion ) ordinary ones

    這項技術非常敏感，甚至能夠在十的十五次方（一千萬億）個普通碳原子中找到一個放射性碳原子。
  5. All living things contain radiocarbon.

    所有生物都含有放射性碳。
  6. The material in this beach has been dated by radiocarbon.

    這個海灘上的物質經過放射性碳測定。
  7. Radiocarbon ages of soils in china

    我國土壤放射性碳年齡
  8. The researchers used radiocarbon dating on 22 pieces of microscopic charcoal found among neandertal tools in fire pits in gorham cave

    研究者們使用放射性碳方法為在山洞中發現的22片木炭確定年代
  9. Using the technique of radiocarbon dating, they all agreed that the cloth dated to the 13th or 14th century ( 1260 to 1390 )

    他們使用放射性碳年代測定法，都同意布料是回溯到十三或十四世紀（ 1260年到1390年） 。
  10. The initial stone circle at stonehenge ? the so - called sarsen stones ? has been radiocarbon - dated to between 2600 and 2500 b. c

    對巨石陣中的石材（就是所謂的砂巖石）進行放射性碳測定，日期在公元前2600年到公元前2500年之間。
  11. A radioactive isotope of carbon, especially carbon14

    放射性碳碳的一種放射性同位素，尤指碳14
  12. Using radiocarbon techniques on sediments collected from four rivers, they determined that bacteria may alter riverine carbon, making it indistinguishable from ocean carbon

    科學家以放射性碳技術研究收集自四條河流的沉積層，發現細菌可以改變河水裡的碳，使它與海水裡的碳無法區別。
  13. The bacterial bioplastic coating argument is the strongest, as there have been cases in which ancient textiles have yielded radiocarbon dates much younger than other artifacts in the same sites ? most notably in the instance of mummy 1770 in the british museum, whose bones dated 800 to 1, 000 years older, according to the radiocarbon tests, than the textile in which they were wrapped

    細菌性的「原生體覆蓋物」的爭論來得更激烈，已經有案例，就是古代紡織品的放射性碳年代測定比其他同樣大小的史前器物的年代要晚得多? ?最值得注意的例子就是1770年陳列在大英博物館的木乃伊，根據放射性碳年代測定，骨骼的年代為800至1000年之久，它們都被包裹著。
  14. This would involve slipping a few radioactive carbon atoms into molecules of the drugs in question

    這涉及到將很多放射性碳原子放入藥物分子中的問題。
  15. The ancestors of modern man moved into and across europe, ousting the neanderthals, faster than previously thought, a new analysis of radiocarbon data shows

    用放射性碳測定年代的一項最新數據顯示，現代人祖先進入歐洲並逐漸取代尼安德特人的過程要比傳統理論認為的更快。
  16. Previously it was thought that this spread took place between 43, 000 and 36, 000 years ago, but the re - evaluated data suggests that it actually happened between 46, 000 and 41, 000 years ago - starting earlier and moving faster

    但是用放射性碳測定年代的一項最新數據表明，遷移過程應該在4 . 6萬年至4 . 1萬年前就已經發生了，即現代人祖先更早且更快地進入了歐洲。
  17. Rather than taking some 7, 000 years to colonize europe from africa, the reinterpreted data shows the process may only have taken 5, 000 years, scientist paul mellars from cambridge university said in the science journal nature on wednesday. " the same chronological pattern points to a substantially shorter period of chronological and demographic overlap between the earliest. modern humans and the last survivors of the preceding neanderthal populations, " he wrote

    據路透社2月23日報道，來自劍橋大學的科學家保羅米拉斯在最新一期的英國自然雜志上指出，用放射性碳測定年代的一項最新數據表明，人類祖先從非洲進入歐洲后，僅花費了5000年的時間就取代了歐洲早期居民尼安德特人，而不是傳統的理論所認為7000年。
  18. Food grains, scraps of cloth, bits of wood and so on can thus be dated by finding out how much radioactive carbon is left in them : the less there is, the older they are

    食用的穀物、衣物的脫屑、少量木屑等等都可以通過計算放射性碳含量而得知他們距今有多久：含量越少，年代越久遠。
  19. Standard test methods for determining the biobased content of natural range materials using radiocarbon and isotope ratio mass spectrometry analysis

    使用放射性碳和同位素比率質譜分析法測定天然材料中生物基含量的標準試驗方法
  20. Working with international colleagues, they have applied dating techniques on the sediment itself and on finds including a land snail, a water snail and a mammoth tooth, all of which came back with an age of around 40, 000 years

    科協家通過放射性碳鑒定技術和激光學鑒定技術斷定，這些腳印屬於人類，且約有4萬年的歷史。除此之外，科學家還發現了一隻蝸牛一隻水蝸牛和一顆猛獁的牙齒，並斷定它們也約有4萬的歷史。
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