For instance, because it takes only 8 days for the radioactive isotopeiodine-131 to decay away to half its original level of radioactivity, simply waiting should be a fix.
例如，碘- 131的放射性只需要八天就衰减到它原来的一半，所以只需要等一等问题就能解决。
2
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。
3
Taking the pills effectively fills the thyroid gland with enough iodine to prevent the gland from absorbing radioactive iodine, a harmful isotope emitted from a nuclear reactor.