同位素

• Ions of different isotopes converge at different points on the photographic plate .
  在照相底板上不同的同位素的离子会聚于不同点。
• A detailed search for the isotopes of all the elements required a more precise technique .
  仔细寻找所有元素的同位素需要更精密的技术。
• It is important to avoid the use of uranium compounds of unspecified isotopic composition .
  要避免使用那种非专用的同位素成份的铀化合物。
• The decisive evidence for isotopes came from two quite different experiments in 1913 .
  对同位素的决定性证明来自1913年两个相当不同的实验。
• In order to differentiate between isotope, a new system of symbol writing had to be developed .
  为了区分同位素，不得不制定新的符号书写体系。
• The radium isotopes are absorbed to an appreciable extent through the human and animal gut .
  镭的同位素通过人和动物的肠子时有很大部分被吸收。
• Extensive research has shown that fractional atomic masses always mean mixture of isotopes .
  进一步的研究揭示出：部分原子质量常是同位素的混合物。
• Today, most cyclotrons are used either for instructional purpose or for isotope production .
  今天大多数回旋加速器是用在教学上，或者用于同位素生产。
• Indirect ionization by neutrons can also result from fission of plutonium or uranium isotopes .
  通过使钚或铀同位素裂变，中于也能产生间接的电离作用。
• Evidence from isotopic dating suggests that the greenstone belts vary considerably in age .
  来自同位素年龄鉴定的证据指出，绿岩带在年龄上彼此变化相当大。