The time required for the energy released by a radionuclide to decrease by half (i. e. , the "half-life") range from tiny fractions of a second to millions of years depending on the type of atoms.
放射性核素释放的能量减半需要的时间范围是几分之一秒到几百万年，取决于原子的类型。
The time required for the energy released by a radionuclide to decrease by half (i. e. , the "half-life") range from tiny fractions of a second to millions of years depending on the type of atoms.
放射性核素释放的能量减半需要的时间范围是几分之一秒到几百万年，取决于原子的类型。
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