Physics. beta (or β) radiation, the second of three types of radiation emitted by radioactive substances, having greater penetrating power than…
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释义 | the world > matter > physics > atomic nucleus > radioactivity > beta radiation > [noun] > ray of (1) beta ray1899 Physics. beta (or β) radiation, the second of three types of radiation emitted by radioactive substances, having greater penetrating power than… |
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