Unfortunately, the ion-exchange technique traps many more non-radioactive iron ions than radioactive cobalt ones.
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。
When the commonest isotope of iron (56Fe) absorbs a neutron, the result is not radioactive.
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。
The radioactive pollution of iron ore imported via Beilun port was studied by measuring the imported iron ore deposited at Beilun port.
通过对堆放在北仑港口的进口铁矿石进行放射性水平测量，研究了北仑港口进口铁矿石的放射性污染状况。
The radioactive pollution of iron ore imported via Beilun port was studied by measuring the imported iron ore deposited at Beilun port.
通过对堆放在北仑港口的进口铁矿石进行放射性水平测量，研究了北仑港口进口铁矿石的放射性污染状况。
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