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

• Pb isotope analysis suggested that Pb mainly came from depth, related with volcanic activity in sea floor.
  铅同位素分析表明矿床铅来源主要为深源，与海底火山活动存在一定关系。
• One way to tell if life is the source of the gas is by measuring isotope ratios.
  其中一个方法判断生活的来源是通过测量气体同位素比率。
• 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
• 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。
• Research and isotope reactor
  研究和制备同位素的反应堆
• 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）。
• The meteoric origin of geothermal water in study area is evidenced by its environmental isotope composition.
  环境同位素研究结果表明，研究区地热水为大气降水成因。
• Methods of Carbon Isotope Analysis for Atmospheric Carbonyl Compounds and the Study of the Organic Pollution;
  大气羰基化合物碳同位素及大气有机污染物研究碳氢化合物是有机化合物。
• ( physics, chemistry) being or containing an isotope with greater than average atomic mass or weight.
  （物理学，化学）指原子质量或者原子量大于平均水平的同位素，或者含有这样的同位素。
• Protein isotope labeling is crucial for NMR studies of the three-dimensional structure and dynamics of proteins in solution.
  在运用核磁共振技术研究蛋白质溶液三维结构和动态特性中，蛋白质的同位素标记表达是研究的关键。