| 1. | Isotopic discrimination is not likely .
同位素甄别是不可能的。 |
| 2. | Later he named these separate forms isotopes .
后来他称这些不同的形式为同位素。 |
| 3. | Radionuclide tracer analysis is a third important method .
第三种重要方法是同位素示踪分析。 |
| 4. | This indium isotope was created at the same time as the earth .
这种铟同位素与地球产生在同一时代。 |
| 5. | Changes of nuclear mass and nuclear size cause isotope shifts .
原子核质量和大小的不同引起同位素移动。 |
| 6. | Thompson was able to demonstrate the existence of two isotopes of neon .
汤普森能证明氖有两种同位素存在。 |
| 7. | The isotope ratio is directly used for comparing oils or gases .
同位素比率直接用于比较各种石油或天然气。 |
| 8. | More reactive are the heavier isotopes of hydrogen, deuterium and tritium .
更为活跃的是氢的较重同位素，氘和氚。 |
| 9. | Atoms of the same element that differ in their atomic weight are called isotopes .
具有不同原子量的同一种元素被称为同位素。 |
| 10. | The isotopic signatures of most ancient limestones indicated the same process .
大多数古代石灰岩的同位素特征说明了同样的过程。 |
