遗憾的是，这种离子交换技术所捕获的非放射性铁离子比放射性钴离子还多得多。
Unfortunately, the ion-exchange technique traps many more non-radioactive iron ions than radioactive cobalt ones.
这颗晕星不同于大多数超新星，它吐出的许多元素比铁还重，其中包括放射性钍和铀。
Unlike most supernovae, this one spewed lots of elements far heavier than iron, including radioactive thorium and uranium.
当最普通的铁（56Fe）的同位素吸收了一个中子，生成物无放射性。
When the commonest isotope of iron (56Fe) absorbs a neutron, the result is not radioactive.
采用火焰原子吸收光谱法测定放射性作业人员血清中铜、铁、锌，并和无射线接触史对照人群作对照；
The amount of serum trace elements in workers exposed to X ray was analyzed by Flame Atomic Absorption Spectrometry, which was compared with the control group.
采用火焰原子吸收光谱法测定放射性作业人员血清中铜、铁、锌，并和无射线接触史对照人群作对照；
The amount of serum trace elements in workers exposed to X ray was analyzed by Flame Atomic Absorption Spectrometry, which was compared with the control group.
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