1、
The radioactive transformation giving rise to these electrons was known as beta decay.
产生这种电子的放射性变化,称为β衰变.
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2、
The residual nucleus will, in general, undergo a radioactive transformation.
剩余核一般说来将发生一次放射性衰变.
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3、
三放射性物质:指可经由自发性核变化释出游离辐射之物质.
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