| 单词 | Particles,Alpha |
| 释义 | Particles,Alpha《英文msh词典》Particles,Alpha [入口词] Particles,Alpha [主题词] Alpha Particles [英文释义] Positively charged particles composed of two protons and two neutrons,i.e.,helium nuclei,emitted during disintegration of very heavy isotopes; a beam of alpha particles or an alpha ray has very strong ionizing power,but weak penetrability. |
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