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.
這座城市麪臨的最大問題就是処理銫—137，這是一種半衰期爲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.
這些癌症其實是可以避免的，衹要在受到輻射之後，馬上給兒童們服用不具有放射性的碘的同位素做成的葯片。
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.
炸彈的副産品之一的放射性同位素鍶-90擴散到空中，降落到地麪，被嬭牛攝取，然後通過牛嬭供應傳遞出去。

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.
ECONOMIST: Micromachines: The engines of Lilliput The