isotope

英 [ˈaɪsətəʊp]

美 [ˈaɪsətoʊp]

n.  同位素

复数：isotopes　

GRETEM8化学

Collins.1 / BNC.13321 / COCA.15337

牛津词典

noun

• 同位素
  one of two or more forms of a chemical element which have the same number of protons but a different number of neutrons in their atoms. They have different physical properties (= characteristics) but the same chemical ones
  1. radioactive isotopes
     放射性同位素
  2. the many isotopes of carbon
     碳的诸多同位素

柯林斯词典

• N-COUNT 同位素
  Isotopesare atoms that have the same number of protons and electrons but different numbers of neutrons and therefore have different physical properties.
  1. ...tritium, a radioactive isotope of hydrogen.
     氢的放射性同位素氚

英英释义

noun

• one of two or more atoms with the same atomic number but with different numbers of neutrons

双语例句

• An isotope of hydrogen which has one neutron ( as opposed to zero neutrons in hydrogen).
  同位素代换的磷酸盐含一个中子的氢的同位素（氢含零个中子）。
• Any radioactive isotope introduced into the body to study metabolism or other biological processes.
  为了研究新陈代谢或其他生物学过程而引入身体的放射性同位素。
• This paper analysed the carbon and oxygen isotope composition of brachiopods fossils from the Devonian Period in Sichuan Province.
  本论文对来自四川龙门山泥盆纪的腕足化石进行碳、氧同位素分析。
• This approach underpins much of my research on energy and nutrient flux, and has involved both natural abundance and enriched isotope tracing techniques.
  该方法巩固了对于我在能量和营养流的研究，并结合了自然丰度和浓缩同位素跟踪技法。
• Oxygen isotope studies of the Suzhou granite have been made based on drill-hole samples.
  本文根据钻孔样品对苏州花岗岩主侵入阶段岩石作了较详细的氧同位素研究。
• Application of stable carbon isotope technique in study of methane emission from rice field
  稳定性碳同位素方法在稻田甲烷研究中的应用
• The Application of Sulfur Isotope in the Cause of Geochemical Abnormality
  硫同位素在地球化学异常成因研究中的应用
• Isotope production reactor of general atomic
  通用原子公司培训研究和同位素生产堆
• A radioactive isotope of carbon.
  碳的一种放射性同位素。
• An obvious restraint in the use of isotope ratios results from the need to employ mass spectrometers.
  使用同位素比值法有着一个明显的局限因素，就是要用质谱仪进行分析。