The process by which an atom changes from an unstable state to a morestable state by emittingradiation is called radioactive decay or radioactivity.
这种原子通过释放射线从不稳定状态变到更加稳定的状态的过程被称为核衰减或放射。
Giant detectors built to look for a hypothetical form of radioactivity in which protons decay never found such a thing.
为了探测质子衰变放射性的假想形式，人们修建了巨大的探测器，但这些探测器从没发现这种东西。
The process by which an atom changes from an unstable state to a more stable state by emitting radiation is called radioactive decay or radioactivity.
原子通过辐射由不稳定状态转变为更加稳定状态的过程称为放射性衰变或放射性。
Better still, it became apparent to him that one could use radioactivity as a clock, with the half-life of a decay series enabling us to calculate the age of a rock.
更妙的是，显然人们可以用放射性作为时钟，用衰变系列的半衰期计算出岩石的年龄。
For instance, because it takes only 8 days for the radioactive isotope iodine-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。
For instance, because it takes only 8 days for the radioactive isotope iodine-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。
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