radioactive isotope

基本解释

The city’s challenge, chiefly, is to dispose of cesium-137, a radioactive isotope with a half-life of 30 years.
这座城市面临的最大问题就是处理铯—137，这是一种半衰期为30年的放射性同位素。
These cancers can be prevented if children are given pills containing the non-radioactive isotope of iodine soon after exposure.
这些癌症其实是可以避免的，只要在受到辐射之后，马上给儿童们服用不具有放射性的碘的同位素做成的药片。
The radioactive isotope Strontium-90, one of the by-products of the bombs, spread into the atmosphere, fell onto the land, was ingested by dairy cows and passed into the milk supply.
炸弹的副产品之一的放射性同位素锶-90扩散到空中，降落到地面，被奶牛摄取，然后通过牛奶供应传递出去。

British officials are still puzzled by the use of this poison, the radioactive isotope Polonium 210.
NPR: Radioactive Poison as an Assassin's Tool
For example, a radioactive isotope such as nickel-63 releases so-called beta particles—a highly energetic form of electrons.
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